10 pcs of Rigid Steel Rules 4R, 6" x 3/4" width, 0.032" thickness, #EG06-4008x10 Machine Tool Accessories 6 mm diameter

6 mm diameter

Insert screw and wrench included

Collet Series: ER40

While it can be used on mild steel occasionally

Made of stainless hardened throughout

10 pcs of Rigid Steel Rules 4R, 6" x 3/4" width, 0.032" thickness, #EG06-4008x10 Machine Tool Accessories 6 mm diameter10 pcs of Rigid Steel Rules 4R, 6" x 3 4" width, 0. 032" thickness, #EG06 4008x10 10 pieces 4R = 1 8" 1 16" 1 32" 1 64" 4R (1 64" & 1 32" on one side and 1 16" & 1 8" on reverse) made from hardened stainless steel with ground edges, have a brushed finish and are 6" x 3 4" wide by 0. 032" thick. scales are deeply and precision etched and black filled for long life and easy readability and graduated with 1 8" and 1 16" increments on one side and 1 32"