6" Machinist Square

Constructed from hardened carbon steel, with high tolerance and ground surface and edges, this 90° engineer/machinist square is ideal for design work. This tool helps with making perfect 90° right angles. German DIN Standard 875 Grade 1. Square Dimensions: 6" (150 mm) Base Thickness: 9/16" (14.35 mm). Square Tolerance: 0.0003". Straightness Tolerance: 0.0006".