60\ & 65\ Shoulder x .300"
Cuts lengthwise dovetail required to install special handgun front
sights from Jim Clark, Ed Brown, Bob Marvel and others. Slightly
undersized to allow for precise final fitting and to compensate for
any machine wear. CAUTION: For use in milling machine
only. High speed steel. .300" (7.3mm) diameter cut, 3⁄8" (9.5mm) diameter shank. 60° or 65° shoulder. DO NOT EXCEED 700 rpm, HIGHER SPEED WILL BREAK TEETH.
1911, Issue:09, Page:061
Big Book Catalog, Issue:66, Page:147
Big Book Catalog, Issue:66, Page:500