Diablo DMAPL4260 SDS-Plus 4-Cutter Hammer Drill BitHighlights: Size: 3 4 x 16 x 18 inch Impact resistant 4 cutter full carbide heat extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration to deliver fast, precise holes 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