Diablo 5 8" x 8" x 13" Rebar Demon SDS Max 4 Cutter Carbide Head Hammer Drill Bit Deck Drive DCU COMPOSITE Screw (Collated) so every element works together so every element works together by design rather than by chance total length provides adequate reach for toolholder clearance while keeping the cutting geometry compact and controllable Drilling into reinforced concrete risks rapid bit failure when the tip contacts rebar the 4 cutter full carbide head and Dura Carbide formula are specifically engineered to handle rebar impact and deliver up to 7X longer service life than standard bits Up to 7X longer life versus standard 2 cutter hammer drill bits fewer bit changes on the job means less downtime and lower cost per hole over the life of the tool