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Threaded Shank Counterbores

Adjustable Counterbores allow you to drill cylindrical flat-bottomed holes while adjusting the depth of cut of the center drill.  Choose from carbide tipped or carbon steel adjustable counterbores with a 7/16-14 threaded shank.  Center drills for adjustable counterbores are sold seperately. 


Adjustable Counterbores, Carbide Tipped, 7/16-14 Threaded Shank, Style 514CT

These Carbide Tipped Threaded Shank Adjustable Counterbores are ideal for making flat-bottom counterbores in wood, hardwood, and even in plastics.  Overall length is 4 1/2" (not including center drill)


Adjustable Counterbores, Carbon Steel, 7/16-14 Threaded Shank, Style 514

These Threaded Shank Adjustable Counterbores have an overall length of 4-1/2" (not including the center drill).