3/4" x 10" x 12", SDS Plus, Rock Carbide, Hammer Bit, Strong Core, Tapered Core For Bit Strength & Maximum Durability, Especially When Drilling Deep Holes, Clean, Round Holes, Two Sharp Cutting Edges For True Holes, Aggressive Material Removal, Two Stage Flute Design With Variable Helix Pattern Allows For Efficient Debris Removal, Wear Mark Indicator For Accurate Diameter Of Holes.