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.
Tools needed:
- 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 with Pilot PIL2
- 3/8″ uses Counterbore CB4 with Pilot PIL4
