Bosch SDS max Drill Bit DXS5060 1 1 8 Inch x 17 In Speed Clean Hollow Concrete Carbide Tipped 4 Cutter Dust Extraction Rotary Hammer Laser Level Advanced Bond Matrix Technology: Specialized Advanced Bond Matrix Technology: Specialized metallic bond holds diamond crystals securely under high frictional heat Extreme Protection Technology (XPT): Internal protective seals channel water droplets and abrasive concrete slurry away from sensitive electronics 4 Cutter Carbide Geometry: Solid carbide tipped tip geometry provides fast drilling speeds and resists rebar impacts Reinforced Concrete Rebar Penetration: Preventing bit hang ups and binding when encountering embedded steel rebar using a solid carbide 4 cutter head