Milescraft T26913 - Counter Bit Set, 4 pc.

Specially designed steel counter sleeve countersinks or counterbores pilot hole simultaneously. Adjustable counter sleeve depth with allen wrench and standard 1/4" hex shank is quick change compatible. Four piece set includes bits for drilling pilot holes for screw sizes #6, #8, #10, and #12 and brad point pilot drill bits are tin coated (#6 bit is not brad point).