SDS Plus, 3/4" x 8", 2 Cutter, Enhanced Rebar Guards Provide Increased Durability, Breaker Points Lead To Faster Drilling Speeds, Variable Flute For Up To 20 Percent More Holes Per Charge In Cordless Rotary Hammers, Centering Tip For Exact Spot Drilling, Wear Mark Indicators To Show End Of Life & When Bit No Longer Meets The ANSI Requirement, Reinforced Flutes For Minimized Vibration & Maximum Durability.