... drill Carbide Tipped Core Drill bits Diameter:65mm Material: Carbon steel, Carbide: YG80C best quality Hollow Hammer drillWith hollow core, connecting rod and pilot drill ... ,70mm, 80mm, 85mm,120mm,100mmMaterial: Carbon steel, Carbide: YG80CAdyantage: open holes for air conditionswidely used in ... Specification: 30mm----150mm Connecting Rod of Hollow Drill: 110mm-----600mm Hex Shank, SDS-PLUS Shank ...