Bosch HCFC2102 SDS-Plus Bulldog Xtreme Rotary Hammer Bit, 5/8" x 8-1/2"Highlights: Diameter x Overall Length: 5 8" x 8 1 2" Extreme rotary Optimized for heavy duty rotary hammers Less carbide wear than two cutters means end user is more productive with each bit No jamming when hitting rebar Diffusion bonding technology provides stronger carbide bond for the longest lasting bit Wear marks assures hole diameter tolerance for anchoring applications Centric conical tip results in precise hole diameters