289A Attachment for Combination Squares 51322

These attachments fit combination square blades 1" (25mm) wide and permit attaching rules, blades or thin steel try squares, up to 1" (25mm) wide, at right angles to the blade of the square for laying out key seats, centers, scribing horizontal lines, and measuring diameters. Blade: 1" (25mm) Range, 1 9/16" (40mm) Length.


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  • Range Blade/Rule:1" (25mm)
  • Seat Length Blade:1-9/16" (40mm)
  • Seat Length Rule:1-11/16" (43mm)
  • Can also be used with 289C Height and Depth Gage Attachment