Tool steel, hardened and precision ground edges, lapped beams and blades, beams and blades are hardened, ground, and lapped to insure parallelism and straightness. 90° angles inside and out, for close tolerance measurements and precise work.
Carbon steel construction, fully ground and polished. Clearance grooves on inside corners. Ungraduated blades available in 2 lengths: 3" and 6".
