Diablo DMAMX1380 SDS‑Plus 4‑Cutter Hammer Drill BitHighlights: Size: 1 1 2 x 31 x 36 inch Full carbide head Up to 7X longer life versus standard 2 cutter hammer drill bits Tri Metal Fusion Welding features up to 3X stronger weld to keep the full carbide head intact during extreme impact such as rebar Precision Tip delivers stability and accuracy required for fast, precise holes Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability Wear mark