Starrett 22C Drill Point Gauge, Hook Rule, 59 Degree Head Bevel Angle, 1/32" Graduations, 6" Length

The head is bevelled to 59 degree (the correct drill point angle) It is also graduated in 1/32" along the 59 degree face for measuring the drill lips which should be of equal lengths The hook rule has accurate, machine-divided graduations in 1/8", 1/16", quick-reading 1/32" and 64" Hook is adjustable and can be shortened or extended on either side of the rule and may also be removed if desired This gage was designed specifically for use in drill grinding, It provides a quick, accurate way for determining the correct drill point angle of 59 degree and the correct length of drill lips necessary for clean-cut drilling at maximum feeds and speeds