Description
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.
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
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