Drill bit set for 1/4" Corby Bolts
Drill bit set for installing corby bolts of size 1/4"
Consists of one each of HSS (steel) drill bits in 4.6 mm and 6.4 mm for corby bolts.
The 4.6 mm is used in both the blade and the handle scales. Then the 6.4 mm drill bit is used to counter-sink the handle scales, being careful to leave enough material for the bolt to grab securely hold of.