... drillModel:MTD03-80Max. drilling diameter:90mmtwo speedsmall,light,and easy control professional drilling big hole Specifications:1) Max. drilling diameter: Φ90mm2 ... 500W5) Unloaded speed: 2,100 / 950r/min6) Net weight: 18kg Two-gear rotary speed is designed, and user can adjust the ... suitable for 52 - 90mm diameter drill bits. It is fitted with a safety clutch, which can avoid damaging the frame when ...