Counterbore

High speed steel straight shank

Used for drilling recessed holes into scales for Corby Bolts, Gulso Bolts, screws etc.

Counterbore pilots must be purchased separately.

Uses a 1.5mm allen wrench or T6 torx drive(included).

Selection Guide:

Corby bolts-

3/16″ uses Counterbore #CB1 with Pilot #PIL1

1/4″ uses Counterbore #CB2 with Pilot #PIL2

5/16″uses Counterbore #CB3 with Pilot #PIL3

Gulso Bolts-

1/4″ uses Counterbore #CB2 with Pilot #PIL5

5/16″ uses Counterbore #CB3 withPilot #PIL2

3/8″ uses Counterbore #CB4 with Pilot #PIL4