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30N3102 - Starrett 4" Forged Steel Combination Square
30N3112 - Starrett 6" Forged Steel Combination Square
30N3113 - Starrett 150mm Forged Steel Combination Square
30N3122 - Starrett 12" Forged Steel Combination Square
30N3123 - Starrett 300mm Forged Steel Combination Square
Using a combination square to check the blade in a table saw is at 90° to the top
Using a combination square to draw a line parallel to an edge with a pencil

30N3102 - Starrett 4" Forged Steel Combination Square

Starrett Premium Combination SquaresMade in U.S.A.

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From: $228.50

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These are Starrett's top-of-the-line combination squares. Useful for joint layout or machine set-up and as depth, height or marking gauges, they feature long-wearing forged steel heads paired with hardened steel rules with photo-engraved scales. The reversible rules have a satin-chrome finish that reduces glare and resists rust, while the precisely machined heads have a smooth enamel finish. Except for the 4" size, all come with a steel scribing pin and a built-in level vial for determining level or plumb.

The 4", 6" and 150mm models are square to within ±0.001" over the full rule length; 12" and 300mm sizes are square to within ±0.002". Imperial rules are graduated in the 4R style (with increments in 8ths, 16ths, 32nds and 64ths); metric rules are graduated in millimetres and half-millimetres on both faces. The 4" rules are 1/16" thick by 5/8" wide; the 6" and 150mm rules are 0.080" thick by 3/4"/19mm wide; the 12" and 300mm rules are 0.090" thick by 1"/25mm wide. Rules are straight and parallel within 0.001" per foot.

A protractor head and center-finding head are offered separately.

Versatile, classic designs. Made in USA.

30N3102 - Starrett 4" Forged Steel Combination Square

Options:

Length

Variations:

  • 30N3102 - Starrett 4" Forged Steel Combination Square
    1 - $228.50
  • 30N3112 - Starrett 6" Forged Steel Combination Square
    1 - $250.50
  • 30N3113 - Starrett 150mm Forged Steel Combination Square
    1 - $239.00
  • 30N3122 - Starrett 12" Forged Steel Combination Square
    1 - $262.00
  • 30N3123 - Starrett 300mm Forged Steel Combination Square
    1 - $345.50

Starrett Premium Combination Squares

These are Starrett's top-of-the-line combination squares. Useful for joint layout or machine set-up and as depth, height or marking gauges, they feature long-wearing forged steel heads paired with hardened steel rules with photo-engraved scales. The reversible rules have a satin-chrome finish that reduces glare and resists rust, while the precisely machined heads have a smooth enamel finish. Except for the 4" size, all come with a steel scribing pin and a built-in level vial for determining level or plumb.

The 4", 6" and 150mm models are square to within ±0.001" over the full rule length; 12" and 300mm sizes are square to within ±0.002". Imperial rules are graduated in the 4R style (with increments in 8ths, 16ths, 32nds and 64ths); metric rules are graduated in millimetres and half-millimetres on both faces. The 4" rules are 1/16" thick by 5/8" wide; the 6" and 150mm rules are 0.080" thick by 3/4"/19mm wide; the 12" and 300mm rules are 0.090" thick by 1"/25mm wide. Rules are straight and parallel within 0.001" per foot.

A protractor head and center-finding head are offered separately.

Versatile, classic designs. Made in USA.

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Close-up of the level vial in the stock
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