Irwin Impact Concrete Screw Installation Bits 3/16"X 4", 2-3/8 In L Flute Size:3/16" x 4" 5/8" diamond knock out arbor

5/8" diamond knock out arbor

Usage: Outdoor

Self dispensing package

stain-resistant

Irwin Impact Concrete Screw Installation Bits 3/16"X 4", 2-3/8 In L Flute Size:3/16" x 4" 5/8" diamond knock out arborBuilt in hex collar for Tapcon* screws or other concrete screws, serves as a stop feature for drilling the perfect hole depth Drill drive installation sleeve slides over bit and engages with hex collar to quickly drive hex or Phillips** head fasteners One piece construction withstands higher torque loads than standard quick change bits 1 4" quick change shank is designed to work with impact drivers, and reduces slipping in standard drill chucks