Combination Squares

A combination square is a versatile adjustable measuring tool that quickly and accurately measures objects for precise work. The combination square is an essential tool for any tool box, more used for meticulous work than production work. This hand tool comes in various sizes ranging from small ones you can keep in your pocket to larger heavy-duty ones that come with all the attachments for bigger jobs.
Combination squares are multifunctional hand tools which can consist of a:
• Square head (also known as a miter head or an anvil) – has a slot which the rule fits through which is locked in place by a screw. Made from die-cast alloy, aluminium, cast iron (strong and resistant to oils and chemicals). More expensive ones are made of forged and hardened steel.
• Rule or blade - manufactured from steel or hardened and tempered steel, accurate markings (metric and imperial) etched into the steel rules, thicker steel blades are better.
• Level bubble vial – acts like a spirit level
• Protractor head – used to set and mark angles
• Centre Finder – easily indicates centre of a round object
• Scriber to mark lines – usually inserted in the end
The heads need changing in order to use the other devices. They are precision instruments which need to be stored carefully as damage to the tool can cause inaccuracies.
Combination Squares are used for:
• Measuring straight lines perpendicular to an edge
• Measuring 90 degree and 45 degree angles
• Drawing lines parallel to the edge
• Easy to lay out a triangular
• Adjustable depth for repetition marking and scribing
• Marking a line around a post or bean for cutting
• Find centre of a round object for example, dial or rod
• Measuring the depth of a groove
• Determining flatness
• Setting bits and blades for example, height of blade
• Use the rule/blade on its own as a ruler
• Fine-tune a machine
• Projector heads - finds any angles you require
• Some have spirit levels on the tool ideal for small jobs
Who uses one?
• Woodworkers
• Stonemasons
• Metalworkers
• Engineers

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Description Price Tool Type Rule Length Rule Subdivisions Head Material Rule Material Scribe Dimensions Height Length Width
RS Stock No. 667-2452
Mfr. Part No.CS300
BrandBahco
TWD668
Each
units
Combination Square 12 in, 300 mm - Die Cast Zinc Stainless Steel Yes - - - -
RS Stock No. 202-9570
Mfr. Part No.F411RS
BrandFisher
TWD309
Each
units
Combination Square 6 in, 152 mm 1 mm, 1/16 in, 1/32 in Aluminium Anodised Aluminium Yes - - - -
RS Stock No. 202-9592
Mfr. Part No.FB33RS
BrandFisher
TWD1,324
Each
units
Combination Square 12 in, 305 mm 1 mm, 1/16 in, 1/32 in Aluminium Steel Yes - - - -
RS Stock No. 667-2459
Mfr. Part No.CS150
BrandBahco
TWD360
Each
units
Combination Square 6 in, 150 mm - Die Cast Zinc Stainless Steel Yes - - - -
RS Stock No. 851-3560
BrandRS Pro
TWD310
Each
units
Combination Square 12in - Steel Steel Yes 304 x 118 x 17mm - - -
RS Stock No. 785-7888
BrandRS Pro
TWD6,352
1 Set
Set(s)
Centre Head, Protractor Head, Square Head 300mm 0.5 mm, 1 mm Steel Tempered Steel Yes - - - -
RS Stock No. 667-2456
Mfr. Part No.CS400
BrandBahco
TWD796
Each
units
Combination Square 16 in, 400 mm - Die Cast Zinc Stainless Steel Yes - - - -
RS Stock No. 249-3987
BrandRS Pro
TWD8,065
Each
units
Combination Square 12in 0.5 mm, 1 mm, 1/32 in, 1/64 in Iron Steel Yes - - - -
RS Stock No. 300-8287
BrandRS Pro
TWD1,022
Each
units
Combination Square 12 in, 300 mm 1 mm, 1/16 in, 1/8 in Steel Steel Yes - 25mm 315mm 160mm
RS Stock No. 663-768
Mfr. Part No.DW750
BrandStarrett
TWD1,594
Each
units
Combination Square 5-3/4 in, 150 mm 0.5 mm, 1 mm, 1/32 in, 1/64 in Iron - - - - - -