Brand: BOSCH Features: Diffusion bonding technology provides stronger carbide bond for a longer-lasting bit 4X longer life in rebar vs. standard SDS-plus® bit Wear mark assures accuracy of hole diameter Centric conical tip guides bit through concrete and provides rounder holes Specifications: Diameter : 5/16 in Useable length : 10.0 in Overall length : 12.0 in Quantity per pack : 1