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Commonly used for RTA (ready to assemble) furniture fittings. Specially-treated high speed steel countersink with polished slow-spiral drill bit. Will perform 3 tasks in one: pilot hole, clearance hole, and countersink. For connecting screws (Confirmat, Directa, etc.). The shankless countersink is heat treated.
*B can be adjusted up to 30mm
Replacement parts: 5x7mm stepped drill #55107; Hex key #5009