63x40mm 160x100mm Machinist Square 90 Degree Right Angle Engineer Set Precision Ground Steel Hardened Angle Ruler Square Ruler

Features: 1. For checking the squareness of an edge, using the light-gap method. The blade is bevelled on both sides.

2. Accuracy grade 1, squareness tolerance of 0.02-0.05 mm.

3. Supplied in a protective case.

4. Beams and blades are ground and lapped for parallelism.

5. 30° Knife edge, beams and blades are ground and lapped.

Package Included: 1 x Edge Square Ruler