Best Locking Carpentry Squares of 2026

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 4 Feb 2026

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Locking Carpentry Squares are a useful tool for carpenters and DIY enthusiasts alike. These squares are designed to assist with accurate measuring and marking of 90-degree angles, ensuring precision in carpentry and woodworking projects. With their locking mechanism, they are able to hold the desired angle in place, providing stability and ease of use. These squares come in a range of sizes and are made from durable materials, making them a reliable addition to any toolbox.

At a Glance: Our Top Picks

QUETTO 9 Inch Adjustable Carpentry Square Cover #TOP 1
QUETTO 9 Inch Adjustable Carpentry Square
ftb score rating icon 9.8
WORKPRO 12-Inch Adjustable Carpentry Square Cover #TOP 2
WORKPRO 12-Inch Adjustable Carpentry Square
ftb score rating icon 9.7
2Pcs Square Carpentry Metal Set Cover #TOP 3
2Pcs Square Carpentry Metal Set
ftb score rating icon 9.5

Top 10 Locking Carpentry Squares

#TOP 1

QUETTO 9 Inch Adjustable Carpentry Square

QUETTO
89C80T28XC051
QUETTO 9 Inch Adjustable Carpentry Square Cover
QUETTO Sliding Bevel 9 Inch Adjustable Carpentry T Square for Accurate Bevel Gauge Ruler Stainless Steel with Hardwood Handle for Craftsman Woodworking Carpenter

The QUETTO Carpentry Square is expertly crafted from premium stainless steel, ensuring high durability and accuracy for your projects. Its sliding T-bevel design, complemented by an ergonomic hardwood handle, allows you to easily adjust to any angle, making precise measurements effortless. The compact size of this tool means you can conveniently carry it around or store it without hassle. Whether you're transferring angles or marking mitre cuts, this tool is essential for both professionals and DIY enthusiasts alike.

What We Like
Durable stainless steel construction
Easy angle adjustments
Compact and portable design
Comfortable hardwood handle

WORKPRO 12-Inch Adjustable Carpentry Square

W064028AU
Clear
32*14*4cm
WORKPRO 12-Inch Adjustable Carpentry Square Cover
WORKPRO 12Inch/300mm Combination Square, Engineers Set Square, Stainless Steel Angle Ruler, Adjustable Carpentry Square 45/90 Degree with Bubble Level, Measuring Tool for Engineer Carpenter

The WORKPRO Carpentry Square is designed for high precision, featuring a spirit level and laser-engraved scales in both metric and imperial units. This ensures you can take accurate measurements for various projects. Crafted from sturdy stainless steel and zinc alloy, its durability means it won’t easily deform or rust, making it a reliable tool for any carpenter. The ergonomic handle allows for comfortable use, ensuring you can take measurements effortlessly. With its multifunctional capabilities, this tool is ideal for woodworking tasks, including measuring angles and lengths.

What We Like
High precision measurements
Durable stainless steel construction
Ergonomic handle for comfort
Suitable for various measurements
#TOP 3

2Pcs Square Carpentry Metal Set

Starvortex
XC-DY005-01
silver
2Pcs Square Carpentry Metal Set Cover
2Pcs Square Carpentry Metal Set, 150 + 300mm Adjustable Combination Try Square Tool with Spirit Level & Marking Needle, 45 & 90 Degree Multifunctional Right Angle Ruler for Engineers Carpenter

Features
[Built For Metal & Wood] Heavy-Duty Stainless Steel Rulers And Aluminum Alloy Heads Laugh Off Rust, Drops, And Daily Wear. Whether You're Welding, Carving, Or DIY-Ing, This Set Square Carpentry Tool Won't Quit.
[Double The Precision & Power] Meet Your New 15cm & 30cm Adjustable Set Squares! Laser-Calibrated Rulers Nail 1mm Accuracy, While The Spirit Level And Scribe Handle Angles, Balance Checks, And Marking In One Sleek Package.
[Slide, Lock, Measure] The Buttery-Smooth Adjustable Ruler Glides For Fast Depth/height Checks, While The Ergonomic Handle And Integrated Scribe Make Marking Lines A Breeze. No Fumbling, No Fuss.
[Compact & Versatile] Keep The 15cm Square In Your Apron For Quick Fixes And Use The 30cm Giant For Layouts. Perfect For Engineers, Hobbyists, Or Anyone Craving Workshop Efficiency.
[All-In-One Workshop Hero] Why Buy Separate Tools? This Combo Set Replaces Your Adjustable Square, Right Angle Ruler, And Marking Gauge. Get Pro Results Without The Clutter—order Now And Build With Confidence!
#TOP 4

Adjustable Stainless Steel Combination Square Tool

CZ-10086
Orange
Adjustable Stainless Steel Combination Square Tool Cover
Combination Square, Set Square Engineers Square 12Inch/300mm Stainless Steel Ruler, Adjustable Carpentry Square 45/90 Degree with Bubble Level, Measuring Tool for Carpenter/Engineer/Woodworking

The Auyuiiy Combination Square is a versatile measuring tool designed for accuracy and convenience. With its adjustable square head, you can easily mark 45 and 90-degree angles, making your carpentry tasks more efficient. The laser-etched measurements are clear and easy to read, ensuring precise readings in both metric and imperial units. Additionally, the built-in bubble level helps you achieve perfect alignment, while the durable stainless steel and zinc alloy construction guarantee longevity and reliability in your woodworking projects.

What We Like
Accurate laser measurement
Adjustable for versatile angles
Durable stainless steel construction
Built-in bubble level

Preciva 7inch Aluminium Square with Drill Holes

MW17001
Black-Type 2
Preciva 7inch Aluminium Square with Drill Holes Cover
Speed Square with 14 Types of Drill Holes, 7inch Metric Triangle Ruler, Aluminum Alloy Carpenters Tools

The Preciva Aluminium Square is an essential carpentry tool featuring 14 different drill gauge holes, allowing you to easily match screws from 3mm to 15mm. Its 7-inch aluminium alloy ruler is lightweight yet robust, ensuring long-lasting accuracy without deformation. The T-shaped base provides stability, preventing slippage while you fix screws, cut, or draw lines. All scales are in metric units with laser engraving, making them clear and easy to read, which enhances your precision in various tasks.

What We Like
Multiple drill sizes available
Lightweight and durable design
Stable T-shaped base
Accurate and easy-to-read scales
#TOP 6

PRESCH 300mm Metric Combination Square Tool

10109
Orange
300mm
PRESCH 300mm Metric Combination Square Tool Cover
Presch Combination Square 300mm Metric – Accurate Metal Carpentry Square with Stop Ruler and Scribing Tool

The PRESCH Combination Square is an accurate carpentry tool designed to meet various woodworking needs. With its glare-free, precise centimetre ruler, you can achieve exact measurements with ease. The multifunctional design allows you to create 45-degree and right angles, making it ideal for multiple tasks. Its durable construction, featuring a cast-zinc body and anti-rust stainless steel ruler, ensures longevity while maintaining accuracy. Additionally, the all-in-one functionality means you won't need to invest in separate tools, simplifying your woodworking projects.

What We Like
Highly accurate measurements
Multifunctional for various tasks
Durable and rust-resistant materials
Convenient all-in-one design
#TOP 7

Preciva Speed Square 18cm with Angle Locator & Hex Nut Finder

MW37003
Black
Preciva Speed Square 18cm with Angle Locator & Hex Nut Finder Cover
Preciva Speed Square 18cm with Angle Locator & Hex Nut Finder, Set Square Carpentry Kit with 5m Tape Measure and Storage Tool, 11 Hole Finders & Waist Hook for High Work, for Woodworking & Roofing

Features
[Perfect For High-Altitude Work] --The Roofing Square Set Includes A Storage Tool. You Can Attach Triangle Ruler, Tape Measure, And Pen To The Storage Tool, Then Secure It To Your Belt Or Waist Tool Bag Using The Hook. It Locks Securely And Does Not Loosen Easily, Ideal For High-Altitude Work, Roof Construction.
[All-In-1 Carpenters Square] --Features Angle Locator, 11 Expansion Bolt Holes (φ3.5-12mm) And Hex Nut Finder (8-16mm) For Precise Measurements In Woodworking Roofing And Other DIY Projects.
[Multi-Functional Combination Square] --Includes 18cm Triangle Ruler, 5m Tape Measure, Storage Tool And Manual (don't Include Pen), Perfect For Carpenters Engineers And Hobbyists.
[High Accuracy & Durability] --Laser-Etched CM / IN Scales, Will Not Wear Out Even After Prolonged Use. With ±0.2mm Precision, Sturdy Materials Not Easily Broken Or Damaged, Have A Long Service Life.
[After-Sale] --We Offer 1-Month Free Replacement, 12-Month Free Warranty And Lifetime Technical Support. Any Questions, Please Don't Hesitate To Contact Us, We'll Reply Within 12h And Provide Satisfied Solution.
#TOP 8

Adjustable Carpentry Square Bevel Gauge T Bevel Blade Ruler

PSFXBM
MGHDJC01HZHUK-CJHUK
Adjustable Carpentry Square Bevel Gauge T Bevel Blade Ruler Cover
Adjustable Carpentry Square Bevel Gauge T Bevel Blade Ruler with Hardwood Handle Angle Measurement Tool Stainless Steel Blade Ruler For Craftsman Carpenter Architect Engineer Woodworking

Features
[Dual Scale Ruler] There Are Metric And Imperial Scales (0-20 Cm, 0-7 Feet) On This Ruler, Which Are Clear And Wear-Resistant, Accurate, Easy To Read And Will Not Fade.
[High-Quality Material] The Blade Of The Stop Angle Is Made Of High-Quality Stainless Steel, Which Is Rust-Proof, Stable And Durable, And Handle Made Of Hardwood For Comfortable .
[Perfect DIY And Professional Choice] It Is Very Suitable For DIY And Professional Use. Perfect For Engineers, Carpenters, Craftsmen, And Architects To Create Precise Lines And Measurements, It Can Create Perfect Lines For Architects, Engineers, Craftsmen, And Carpenters, Providing Accurate Angles And Precise Dimensions.
[Easy To Carry] With The Perfect Size Of The Ruler, You Can Carry It In The Tool Box, It Does Not Take Up A Lot Of Space And Is Very Convenient To Carry.
[Adjustable Angle] The Adjustable Angle Can Rotate 360 Degrees With A Locking Knob To Secure Any Angle From 0 To 360 Degrees This Tool Also Doubles As A Depth Gauge For Versatile Use.

Eidoct Aluminium Carpentry Roofing Speed Square

T-12
Black
Eidoct Aluminium Carpentry Roofing Speed Square Cover
Aluminium Carpenter's Roofing & Woodworking Speed Square - 30cm Metric Rafter Triangle Ruler Protractor - Angle Measuring & Marking Tool for Carpentry, Construction & DIY Projects

The Eidoct Aluminium Speed Square is a high-quality tool crafted from aluminium alloy, offering excellent hardness and resistance to rust, so it lasts longer and withstands drops without deforming. Its clear and precise scale, printed with laser marking technology, allows you to draw accurate straight or curved lines with ease. The square features a horizontal base with one 90° and two 45° angles, making it simple to measure and mark angles accurately. Lightweight yet sturdy, this tool is perfect for precise right-angle measurements and a variety of carpentry or DIY tasks.

What We Like
Durable aluminium alloy build
Clear, precise laser-marked scale
Multiple angle measurement options
Lightweight and sturdy design
#TOP 10

Senbaler 12 Inch Aluminium Triangle Ruler

Senbaler
GH0021c
Senbaler 12 Inch Aluminium Triangle Ruler Cover
Senbaler 12 Inch/300mm Aluminum Alloy Triangle Ruler, Woodworking Speed Square Metric, Carpenters Square for Angle Measuring Marking (Red)

The Senbaler Triangle Ruler is crafted from high-quality aluminium alloy, ensuring durability and resistance to rust and corrosion, making it a reliable tool for your projects. Its clear and precise scale, with both metric and imperial measurements, allows you to draw accurate lines effortlessly. The horizontal base features a 90° angle and two 45° angles, making it easy to measure and mark dimensions. Additionally, its lightweight design provides convenience during use, simplifying your woodworking tasks.

What We Like
Durable aluminium alloy construction
Clear and precise scale
Multiple angle measurements
Lightweight and easy to use
Buying Guide Image
Editor's Notes

During our locking carpentry square research, we found 192 locking carpentry square products and shortlisted 10 quality products. We collected and analyzed 45,056 customer reviews through our big data system to write the locking carpentry squares list. We found that most customers choose locking carpentry squares with an average price of £12.64.

The locking carpentry squares are available for purchase. We have researched hundreds of brands and picked the top brands of locking carpentry squares, including QUETTO, WORKPRO, Starvortex, Auyuiiy, Preciva.

Written by
Jennifer Fraser Avatar

Jennifer Fraser is a licensed contractor specializing in sales, maintenance, and kitchen, bathroom, and home appliances, tools, and utilities. She owns a store in Leeds where you can get any home and tool appliance. Jenny has a degree in literature, but she combines her knowledge and experience with her degree to publish DIY articles on solving home appliances issues to keep up the family enterprise.