No-Mark Rubber Ring Even though the stop collar is free-spinning, Smart-Bit also adds a rubber O-ring to make sure it stops properly and without leaving any marks behind.
Tungston Carbide Bits & Countersink The Tungston carbide tipped countersink and bits minimize wear and help maximize the life of the tool.
Anti-Clog Debris CavityThe Smart-Bit debris cavity gathers waste material, keeping it clear of the countersink, unlike conventional flush mounted countersinks
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