A combination square is a multi-use measuring instrument which is primarily used for ensuring the integrity of a 90° angle, measuring a 45° angle, measuring the center of a circular object, find depth, and simple distance measurements.
It can also be used to determine level and plumb using its spirit level vial.
Before using a combination square, one must first be familiar with the structure and terminology of the square itself. A combination square consists of a rue-type blade attached to a handle. The handle is composed of two parts, a shoulder and an anvil. The shoulder is placed at an angle of 45° between itself and the blade. It is therefore used for the measurement and layout of miters. The anvil is placed at a 90° angle between itself and the blade. The handle contains an adjustable knob which allows it to move freely horizontally along the edge of the ruler so that it may be tailored towards any size job. Additionally contained within the head of the handle is a scriber used for marking measurements and a vial which may be used for measuring plumb and level.
Showing 1–80 of 145 results
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Starrett USA No 13 4″ Adjustable T Square
SKU:MS7462 $79.00 View details -
Craftsman USA 12″ Adjustable Square
SKU:MC8675 $39.00 View details -
Brown & Sharpe 12″ Adjustable Combination Square
SKU:M14233 $125.00 View details -
Solid Brass Square With Screw Angle Adjust
SKU:M15427 $125.00 View details -
Starrett No4R Grad Combination Square
SKU:MS15420 $135.00 View details -
Combination Square 6″ Long With Level And Scribe
SKU:ML15388 $45.00 View details -
Brown & Sharpe Mini Adjustable Square
SKU:MB6009 $65.00 View details -
Union USA Adjustable Combination Square Complete
SKU:MU13622 $120.00 View details -
Starrett No13a Double Square In Original Box
SKU:MB6750L $130.00 View details -
Starrett Combination Set No9 In Top Condition
SKU:MS12793 $235.00 View details -
Starrett No11HC Combination Square
SKU:MS15393 $165.00 View details -
Union No212-34 12″ Combination Set
SKU:MU12872 $160.00 View details -
USA Made 6″ Combination Square Complete
SKU:MU14223 $85.00 View details -
Lufkin No525 Combination 3 Piece Set
SKU:MD2830 $135.00 View details -
Fowler Usa 6″ Adjustable Square Imperial
SKU:MF7063 $85.00 View details -
Starrett No712-4 Combination Attachment
SKU:M4390 $39.00 View details -
Starrett No 4 Combination Square, 4″ Long
SKU:M4516 $120.00 View details -
Union USA 6″ Adjustable Square, Great Condition
SKU:C14982 $59.00 View details -
Lufkin USA, 6″ Adjustable Square
SKU:M5511 $75.00 View details -
Starrett 4″ Double Square No13A, IOB
SKU:D3125x $135.00 View details -
Starrett USA 18″ Combination Set,
SKU:C13682 $195.00 View details -
Starrett No13 E Double Square With Angle Gauge
SKU:7737 $185.00 View details -
Craftsman USA 12″ Adjustable Square, Heavy Duty
SKU:M15259 $42.00 View details -
Brown & Sharpe 6″ Adjustable Square, Nice
SKU:MNN15097 $55.00 View details -
Starrett No 11 – 6″ Adjustable Square, IOB,
SKU:MN3508 $85.00 View details -
Mayers USA 12″/30cm Adjustable Square,
SKU:M14541 $49.00 View details -
Starrett No. 14 adjustable square v2804
SKU:v2804 $105.00 View details -
Mayes USA 6″ adjustable square V8628
SKU:v8628 $58.00 View details -
Master Mechanics Usa 6" Combination Square.
SKU:6072 $45.00 View details -
Lufkin USA No26b, 6″ Double square, IOB
SKU:M14577 $105.00 View details -
Lufkin Usa 6" Combination Square, Nice And Clean.
SKU:3421 $70.00 View details -
Lufkin USA 4″ long adjustable square
SKU:b1834f $65.00 View details -
Lufkin USA 4″ adjustable square V5554
SKU:v5554 $65.00 View details -
Lufkin Usa 4" Double Square.
SKU:D2352 $60.00 View details -
Lufkin Usa 4 Double Square.
SKU:G5008 $60.00 View details -
Lufkin USA 24" adjustable sqr rule, fits starrett
SKU:b6694 $85.00 View details -
Lufkin Usa 12" Combination Square Set.
SKU:G1548 $135.00 View details -
Lufkin rule No4 Grad with spirit level
SKU:m12400 $65.00 View details -
Lufkin Combination Set, Nice And Clean, Owners Marks.
SKU:D2555 $110.00 View details -
Lufkin 4" Combination Square.
SKU:D2815 $60.00 View details -
Lufkin 4" Combination Square.
SKU:D2915 $60.00 View details -
Lufkin 4 Adjustable Square.
SKU:G5314 $75.00 View details -
Lee Valley USA 4" double square, little used
SKU:a6640 $65.00 View details -
L S Starrett Model Makers Square.
SKU:6657 $85.00 View details -
Vintage Solid Brass 12 in 1 Combo tool, patent 1927
SKU:M14770 $85.00 View details -
Very Rare Starrett adjustable square, Good Condition
SKU:b6251 $205.00 View details -
Usa Made Adjustable Square 4, Solid Brass, Nice And Heavy.
SKU:G5061 $105.00 View details -
USA made 4" double square little used
SKU:a6458 $75.00 View details -
Usa 6" Adjustable Square, Imperial.
SKU:7064 $85.00 View details -
Usa 12" Adjustable Square, Very Heavy.
SKU:C1625 $70.00 View details -
Union Usa Combination Square, Nice And Clean And Ready To Use.
SKU:5991 $135.00 View details -
Union USA 6" adjustable square
SKU:a6588 $65.00 View details -
Union USA 4″ double square
SKU:b1834b $65.00 View details -
Union USA 4″ double square
SKU:b1817 $65.00 View details -
Union Usa #612 Protractor Head Iob.
SKU:D3085 $60.00 View details -
Union Tool Usa 4" Double Square. Fine
SKU:2007 $75.00 View details -
Union Combination Set 6", 3Pc.
SKU:C1622 $95.00 View details -
Starrett USA H33-1224 Square Head
SKU:M13835 $75.00 View details -
Starrett USA 6″ combination square
SKU:b1833a $90.00 View details -
Starrett USA 6″ combination square
SKU:b1837 $90.00 View details -
Starrett USA 4″ long #60 double square
SKU:b1826 $58.00 View details -
Starrett USA 4″ double square
SKU:b1818 $70.00 View details -
Starrett USA 23 adjustable square 6″ long
SKU:b1834e $85.00 View details -
Starrett USA 18″ adjustable square V8631
SKU:v8631 $85.00 View details -
Starrett Pr-1224 Protractor Head Only
SKU:M13044 $75.00 View details -
Starrett No13 4″ Miniature Double Square, Imperial.
SKU:7062 $75.00 View details -
Starrett No. 11 Combination Square With Center Head In The Original Box.
SKU:6352 $165.00 View details -
Starrett Combination Square 4", Little If Any Use, Looks Like 45 Is From Another Set.
SKU:C1616 $110.00 View details -
Starrett Combination Set, 12", Metric Extra Rule Add $25
SKU:1294 $190.00 View details -
Starrett Combination Set With Brown & Sharpe Rule, Nice And Clean.
SKU:2161 $110.00 View details -
Starrett Combination Set Pn# 435-12-4R. It Is Complete And Comes With Square Head, Center Head, And Reversible Protractor Head And Blade.
SKU:V6971 $235.00 View details -
Starrett Combination Set 9", 3Pc.
SKU:C1624 $110.00 View details -
Starrett Combination Set 6", 3Pc.
SKU:C1623 $95.00 View details -
Starrett C11H-6-4r Adjustable sqr 6″, iob
SKU:a5456 $105.00 View details -
Starrett adjustable square, 4" rare type
SKU:g9497 $90.00 View details -
Starrett Adjustable Square 6″, Little If Any Use.
SKU:VC1617 $105.00 View details -
Starrett Adjustable Square 6".
SKU:C1614 $85.00 View details -
Starrett 6" rare narrow rule adjustable square
SKU:a6719 $85.00 View details -
Starrett 6" Comination Square Set, Owners Name On Rule.
SKU:4275 $95.00 View details -
Starrett 6" Adjustable Square, Good Vial And Nice Imperial Rule.
SKU:6689 $85.00 View details
Showing 1–80 of 145 results