File specification developed in the course of the ERGO™ process. For filing holes, larger hollow throat and concave surfaces. Shape: Conical surface. 4" and 6" pointed, 8" and longer half-pointed. Double-hob. Cut: 1 = Bastard, 2 = Halfpenny, 3 = plain.
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Description
File specification developed in the course of the ERGO™ process. For filing holes, larger hollow throat and concave surfaces. Shape: Conical surface. 4" and 6" pointed, 8" and longer half-pointed. Double-hob. Cut: 1 = Bastard, 2 = Halfpenny, 3 = plain.