Best Plastic Carpentry Squares of 2025

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 1 Feb 2025

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Plastic carpentry squares are versatile measuring tools used by carpenters, builders and DIY enthusiasts. Made from durable plastic, they come in a range of sizes and are designed to provide accurate measurements for a variety of tasks such as marking right angles, checking for squareness and measuring angles. These squares are lightweight, easy to handle and can withstand wear and tear. They are an essential tool for anyone involved in woodworking or construction projects, providing precision and accuracy to ensure a professional finish.

At a Glance: Our Top Picks

WORKPRO 180mm Speed Square and 300mm Set Cover #TOP 1
WORKPRO 180mm Speed Square and 300mm Set
ftb score rating icon 9.8
OX Tools Trade Roofing Plastic Rafters Square Set Cover #TOP 2
OX Tools Trade Roofing Plastic Rafters Square Set
ftb score rating icon 9.7
Adjustable Sliding T Bevel Ruler by SEIWEI Cover #TOP 3
Adjustable Sliding T Bevel Ruler by SEIWEI
ftb score rating icon 9.5

Top 5 Plastic Carpentry Squares

#TOP 1

WORKPRO 180mm Speed Square and 300mm Set

W002703
Natural
WORKPRO 180mm Speed Square and 300mm Set Cover
WORKPRO 180mm Speed Square and 300mm Combination Square Set, Aluminum Speed Square and Stainless Steel Combination Square, Adjustable Carpentry Square, Measuring Tool for Engineer Carpenter

The WORKPRO Square Set is a versatile carpentry tool kit designed for precision and ease of use. Made from high-quality aluminium alloy and stainless steel, the tools resist corrosion and offer durability, ensuring they won't easily break like plastic. The combination square includes a level, and laser-engraved scales enhance accuracy for your measurements. With its multifunctional design, you can effortlessly measure various angles and dimensions, making your woodworking projects more efficient. The user-friendly design allows you to quickly mark angles from 0 to 90 degrees, saving you valuable time during your work.

What We Like
High-quality, durable materials
Laser-engraved for accuracy
Multifunctional measuring capabilities
Easy angle measurement
#TOP 2

OX Tools Trade Roofing Plastic Rafters Square Set

OX-T433702
white
OX Tools Trade Roofing Plastic Rafters Square Set Cover
OX Tools Trade Roofing Plastic Rafters Square Set -180mm & 300mm

The OX Trade Rafters Square Set includes two squares, 180mm and 300mm, providing you with versatile measurement options for carpentry and roofing tasks. Made from heavy-duty ABS plastic, these squares are durable enough to withstand demanding construction environments. The easy-to-read gradations ensure you can make precise measurements and angle markings, enhancing your accuracy. Additionally, the wide base allows for a secure hold on materials, giving you stability during your projects, whether you're cutting or marking.

What We Like
Durable heavy-duty ABS plastic
Clear and accurate gradations
Wide base for secure hold
Versatile for various projects
Ideal for carpenters and roofers
#TOP 3

Adjustable Sliding T Bevel Ruler by SEIWEI

WGP-HA6198C-TS
Blue
300mm
Adjustable Sliding T Bevel Ruler by SEIWEI Cover
Carpentry Square Bevel Gauge, Adjustable Sliding T Bevel Ruler with Plastic Handle for Craftsman, Engineer and Architect (300mm)

The SEIWEI T Bevel Ruler features a stainless steel blade that ensures durability and resistance to deformation, making it a reliable choice for your projects. You can easily adjust the movable square to any angle by rotating the central knob, providing you with professional precision when needed. This ruler also serves as a depth gauge, allowing you to transfer angles conveniently, which is especially beneficial for intricate designs. The high-quality plastic handle ensures comfort during use, allowing you to work for extended periods without discomfort.

What We Like
Durable stainless steel blade
Adjustable to any angle
Convenient depth gauge functionality
Comfortable plastic handle

PRESCH 300mm Metric Combination Square Tool

10109
Orange
300mm
PRESCH 300mm Metric Combination Square Tool Cover
Presch Combination Square 300mm Metric – Accurate Carpentry Square made of Metal with Stop Ruler and Scribing Tool – Woodworking Square 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 5

Dapetz 6-Inch Adjustable Carpentry Square Set

DP01325
Silver
Dapetz 6-Inch Adjustable Carpentry Square Set Cover
Dapetz ® Carpentry Squares 6inch/150mm,square Right Angle Ruler Protractor Engineers Adjustable Carpentry Square 45/90° With Bubble Level Stainless Steel Measuring Tools Multi Combination Set

The Dapetz Carpentry Square offers exceptional quality with its sturdy stainless steel construction, ensuring durability and resistance to rust. Measuring 6 inches, it provides precise 90 and 45-degree angles, making it ideal for various carpentry tasks. The ergonomic handle allows you to take measurements comfortably and accurately, enhancing your woodworking experience. Additionally, this multifunctional tool is perfect for measuring depths, heights, and scribing, thus serving as an essential companion for any DIY enthusiast.

What We Like
Durable stainless steel construction
Precise angle measurements
Comfortable ergonomic handle
Multifunctional for various tasks
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is a carpenter square called?

The steel square is a tool used in carpentry. ... Today the steel square is more commonly referred to as the framing square or carpenter's square. It consists of a long, wider arm and a shorter, narrower arm, which meet at an angle of 90 degrees (a right angle).

2. What are squares used for in carpentry?

A square is a tool used for marking and referencing a 90° angle, though mitre squares are used for 45° angles. Squares see common use in woodworking, metalworking, construction and technical drawing. Some squares incorporate a scale for measuring distances (a ruler) or for calculating angles.

3. What are the four features of a carpenter's square?

One should not be fooled by the simplicity of its appearance, however: the carpenter's square contains numerous scales, including a diagonal scale, a board foot scale, and an octagonal scale.

Editor's Notes

During our plastic carpentry square research, we found 182 plastic carpentry square products and shortlisted 5 quality products. We collected and analyzed 36,724 customer reviews through our big data system to write the plastic carpentry squares list. We found that most customers choose plastic carpentry squares with an average price of £12.39.

The plastic carpentry squares are available for purchase. We have researched hundreds of brands and picked the top brands of plastic carpentry squares, including WORKPRO, OX Tools, SEIWEI, PRESCH, Dapetz. The seller of top 1 product has received honest feedback from 3,359 consumers with an average rating of 4.9.

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.