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Irwin
Lobular design reduces stripping damage by driving the fastener on the sides instead of forcing the corners to turnFor use with sheet metal screws and other hexagonal head fastenersProvides more clearance on the corners of the fastener where paint build-up can occur
Century Drill And Tool Step Drill 8 Steps #20 9/16″-1″ Hss Zirconium Coated Step Depth 1/8″ Shank 3/8″
Century Drill And Tool Step Drill 9 Steps #3 1/4″-3/4″ Hss Zirconium Coated Step Depth 1/8″ Shank 3/8″
Irwin 61112 3/16 Masonry Bit
Century Drill And Tool Tapcon Masonry Drill Bit 5/32″ Cutting Length 3″ Overall 4-1/2″ Shank 5/32″
Century Drill And Tool Step Drill 12 Steps #4 3/16″-7/8″ Hss Zirconium Coated Step Depth 1/8″ Shank 3/8″