Brand: BOSCH Features: Diffusion bonding technology provides stronger carbide bond for a longer-lasting bit 5X longer life in rebar vs. standard SDS-MAX® bit Wear mark assures accuracy of hole diameter Centric conical tip guides bit through concrete and provides rounder holes Specifications: Diameter : 1.0 in Overall Length : 21.0 in Quantity : 1 Useable Length : 16.0 in