SDS max-4 Drill Bit is equipped with a 4-cutter head and delivers long lifetime in concrete. 4-cutter design ensures prolonged use with no jamming when drilling rebar. 2-flute U-shape also lengthens life while offering good dust removal. Fits all SDS max rotary hammer drills. Diameter (D): 25 mm, Working length (L1): 200 mm, Total length (L2): 320 mm.