Best Silverline Box Spanners of 2025

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 1 Feb 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Box spanners are a versatile and essential tool for any DIY enthusiast or professional mechanic. The Silverline brand offers a range of high-quality box spanners in various sizes to fit different bolts and nuts. These spanners are made from durable materials and have a slim profile, making them ideal for use in tight spaces. They also feature a box-end design that provides a secure grip on fasteners, preventing slippage and rounding. Whether you're working on your car, bike, or household appliances, Silverline box spanners are a reliable choice to get the job done.

At a Glance: Our Top Picks

Silverline 589709 6-Piece Metric Box Spanner Set Cover #TOP 1
Silverline 589709 6-Piece Metric Box Spanner Set
ftb score rating icon 9.8
Silverline Monobloc Back Nut Tap Spanner Set Cover #TOP 2
Silverline Monobloc Back Nut Tap Spanner Set
ftb score rating icon 9.7
Silverline Box Spanner Metric Set 8-22 mm Cover #TOP 3
Silverline Box Spanner Metric Set 8-22 mm
ftb score rating icon 9.5

Top 10 Silverline Box Spanners

Silverline 589709 6-Piece Metric Box Spanner Set

589709
Silver
Silverline 589709 6-Piece Metric Box Spanner Set Cover
Silverline 589709 Box Spanner Metric Set 6pce 8 - 19 mm, Silver

The Silverline 589709 Box Spanner is a versatile tool set that includes double-ended spanners in sizes ranging from 8 mm to 19 mm. This feature allows you to tackle various nuts and bolts with ease, providing convenience for both DIY enthusiasts and professionals. The inclusion of a TMMY bar further enhances your ability to apply torque effectively, making your tasks simpler. With six different sizes, you can easily find the right fit for your needs, ensuring you can work efficiently without searching for the right tool.

What We Like
Double-ended design
Includes TMMY bar
Six versatile sizes
Convenient for various tasks
#TOP 2

Silverline Monobloc Back Nut Tap Spanner Set

395020
Multi
Silverline Monobloc Back Nut Tap Spanner Set Cover
Silverline Monobloc Back Nut Tap Spanner 5pce 8/9, 9/11, 10/11 & 12/13mm (395020) Multi

The Silverline Tap Spanner Set is crafted from corrosion-resistant, zinc-plated steel, ensuring durability for long-term use. Its long reach allows you to access restricted areas easily, making it convenient for various plumbing tasks. Designed specifically for 8/9, 9/11, 10/11, and 12/13mm fittings, it simplifies the process of fitting back nuts to monobloc taps. This set is ideal for both professionals and DIY enthusiasts, providing you with the right tools for effective plumbing repairs.

What We Like
Corrosion-resistant materials
Long reach for tight spaces
Compatible with multiple fittings
Easy to use
#TOP 3

Silverline Box Spanner Metric Set 8-22 mm

571532
Multi-coloured
8 - 22mm
Silverline Box Spanner Metric Set 8-22 mm Cover
Silverline 571532 Box Spanner Metric Set 8pce 8 - 22 mm

The Silverline Box Spanner Set is designed for convenience and durability. Made from corrosion-resistant steel, you can trust this set to endure tough conditions without rusting. The matt finish provides excellent grip, ensuring you can work confidently without slipping. This set includes various spanner sizes, allowing you to tackle a range of tasks with ease. Additionally, it features a 14 mm spark plug spanner, making it perfect for automotive work and ensuring you have the right tool for the job.

What We Like
Corrosion-resistant steel construction
Excellent grip with matt finish
Variety of spanner sizes included
Includes spark plug spanner
#TOP 4

Silverline Monobloc Back Nut Tap Spanner 27 & 32mm

656636
Multi-coloured
1 - Pack
Silverline Monobloc Back Nut Tap Spanner 27 & 32mm Cover
Silverline Monobloc Back Nut Tap Spanner 27 & 32mm (656636)

The Silverline Back Nut Tap Spanner is designed for ease of use with monobloc taps. Made from corrosion-resistant, zinc-plated steel, it ensures durability and longevity, making it a reliable tool for your plumbing needs. Its double-ended design allows you to tackle both 27mm and 32mm fittings, providing versatility in your tasks. This spanner simplifies the process of fitting back nuts, saving you time and effort during installations and repairs.

What We Like
Corrosion-resistant material
Double-ended design
Compatible with multiple sizes
Easy to use
Durable construction
#TOP 5

Silverline Monobloc Tap Spanner Set 3pc

719819
Silver
1 - Pack
Silverline Monobloc Tap Spanner Set 3pc Cover
Silverline Monobloc Back Nut Tap Spanner 3pce 9 x 11 & 12 x 13mm (719819)

The Silverline Tap Spanner Set is designed for ease of use when fitting back nuts to monobloc taps. Its corrosion-resistant, zinc-plated steel construction ensures durability and longevity, making it a reliable choice for your plumbing needs. The long reach feature allows you to access those hard-to-reach areas, providing convenience during installation. Additionally, it accommodates fasteners sized 9 x 11mm and 12 x 13mm, making it versatile for different applications.

What We Like
Corrosion-resistant material
Long reach for tight spaces
Compatible with multiple fastener sizes
Ideal for monobloc taps
#TOP 6

Silverline 10 Piece Crows Foot Spanner Set

111508
Chrome (Finish)
Silverline 10 Piece Crows Foot Spanner Set Cover
Silverline 10 Piece Crows Foot Spanner Set 10-19 mm

The Silverline Crows Foot Spanner Set is designed for use with 3/8" drive ratchets and extensions, making it ideal for reaching recessed and hidden fasteners. Crafted from hardened and tempered, drop-forged chrome vanadium, these tools are built to last and withstand rigorous use. The high-quality fully polished finish not only enhances durability but also makes cleaning easy after use. Additionally, the set comes with a convenient plastic storage rack, ensuring that your tools are organised and easily accessible whenever you need them.

What We Like
Versatile for hidden fasteners
Durable chrome vanadium construction
Easy to clean finish
Organised storage rack included
#TOP 7

Silverline 27 & 32mm Monobloc Tap Spanner

345653
Silver
27 & 32mm
Silverline 27 & 32mm Monobloc Tap Spanner Cover
Silverline Monobloc Back Nut Tap Spanner Long Pattern 27 & 32mm (345653)

The Silverline Tap Spanner is designed for ease of use when fitting back nuts to monobloc taps. Its corrosion-resistant, zinc-plated steel construction ensures durability, making it a reliable tool for your plumbing tasks. The long pattern design improves access to tight spaces, which is particularly useful in confined areas. This tool accommodates both 27mm and 32mm fittings, providing versatility for various applications, ensuring you have the right tool at hand for your needs.

What We Like
Corrosion-resistant design
Improved access in tight spaces
Fits 27 & 32mm fittings
Durable zinc-plated steel
#TOP 8

Silverline 479849 Adjustable Telescopic Basin Wrench

479849
278 - 455mm
Silverline 479849 Adjustable Telescopic Basin Wrench Cover
Silverline 479849 Telescopic Basin Wrench

The Silverline Basin Wrench is a versatile tool designed for plumbing tasks. Made from chrome-plated, spring-loaded steel, it offers durability and strength. The self-locating, self-locking hook ensures that you can securely grip nuts ranging from 9 mm to 32 mm, making it suitable for various fittings. With an adjustable length of 278 mm to 455 mm in 60 mm increments, it provides flexibility for reaching tight spaces. Additionally, the pivoted, multi-position adjustable jaw allows you to work at different angles, enhancing your efficiency.

What We Like
Durable chrome-plated steel
Self-locking hook
Adjustable length
Multi-position jaw
#TOP 9

Silverline Cone Spanner Set 2 Pieces

240859
Black
13-16 mm
Silverline Cone Spanner Set 2 Pieces Cover
Silverline Cone Spanner Set 2pce 13/14 & 15/16 mm (240859)

The Silverline Cone Spanner Set is an essential tool for anyone working with narrow lock nuts. Its slim design ensures that you can easily access tight spaces, making adjustments a breeze. With two pieces, you can quickly switch between sizes, allowing for efficient work on various axles. The sizes of 13/14 mm and 15/16 mm fit most standard axles, providing versatility. Plus, the painted finish offers corrosion resistance, ensuring that your tools remain in great condition over time.

What We Like
Slim design for tight spaces
Two versatile sizes included
Corrosion-resistant finish
Easy adjustments
#TOP 10

Silverline 4-Piece Monobloc Tap Spanner Set

395020
Silverline 4-Piece Monobloc Tap Spanner Set Cover
SILVERLINE , Plumbers Monobloc Back Nut Tap Spanner 4pce Set 8mm to 13mm

The Silverline Tap Spanner Set includes four tools designed for monobloc back nuts, accommodating sizes from 8 mm to 13 mm. This range of sizes ensures you can tackle various plumbing tasks with ease. The spanners are specifically crafted to provide a secure grip, making it simpler to loosen or tighten nuts without slipping. Their robust design offers durability, so you can rely on them for your plumbing needs. This set is an essential addition to your toolbox for both professional plumbers and DIY enthusiasts.

What We Like
Durable design
Versatile size range
Secure grip
Essential for plumbing tasks
Buying Guide Image
Editor's Notes

During our Silverline box spanner research, we found 11 Silverline box spanner products and shortlisted 10 quality products. We collected and analyzed 53,627 customer reviews through our big data system to write the Silverline box spanners list. We found that most customers choose Silverline box spanners with an average price of £6.28.

The Silverline box spanners are available for purchase. The top 10 picks range in price from a low of £2.00 to a high of £24.00, find the one that fits your budget. The seller of top 1 product has received honest feedback from 882 consumers with an average rating of 4.7.

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.