Machinists' production V-block

A production V-block for securing circular work pieces for machining operation, said V-block comprising:

• an elongated rectangular ferromagnetic base having planar parallel top and bottom surfaces, parallel side surfaces perpendicular to said top and bottom surfaces, and end surfaces;
• a rectangular groove in the intersection of one of said side surfaces with said top surface, said groove having a side surface parallel to said surface of said ferromagnetic base, the bottom surface of said groove forming a shelf in the side surface of said base;
• a plurality of lateral "V" grooves across the top surface of said ferromagnetic base, said grooves being equally spaced and between equally islands in said top surface, said grooves being at a constant depth with the apex of each "V" being flush with said shelf;
• and
• a plurality of vertically adjustable jaw members overlying said islands and said adjacent "V" grooves, each of said jaw members having a triangular depending jaw with an apex vertically aligned over an apex of a "V" groove in the surface of said base, each of said jaw members being vertically adjustable by a screw locked in said jaw member and extending into the island which it overlies.