Technical parameters 1) Voltage: 220V 2) Frequency: 50Hz 3) Maximum Power: 30W 4) Motor no-load speed: 10000r/min 5) Chuck diameter: (0.5/1.0/1.5/2.5/3.0} 6) Transformers: 12V/0.8A Features 1) Compact design, comfort grip 2) ABS plastic body, light weight, suitable for long working hours 3) quick-change chuck device, without any tools 4) the replacement of different bits and chuck, you can drill holes of different diameter 5) Use matching wheel and grinding wheel, can be polished, polishing, cutting, etc 6) with a special inflatable tool box, small size, light weight, easy to carry Configuration A high-speed steel drill bit 5 (diameter 0.5 to do; 1.0; 1.5; 2.5; 3.0) B chuck 5 (internal diameter 0.5 to do; 1.0; 1.5; 2.5; 3.0) C polished ceramic grinding wheel 4 D disconnect the grinding wheel 1, wheel handle a sand E transformer 1 (output 12V0.8ADC) F blowing a boxSpecification: Package Weight One Package Weight 0.92kgs / 2.03lb Qty per Carton 8 Carton Weight 7.30kgs / 16.09lb Carton Size 21cm * 30cm * 28cm / 8.27inch * 11.81inch * 11.02inch Loading Container 20GP: 1511 cartons * 8 pcs = 12088 pcs40HQ: 3509 cartons * 8 pcs = 28072 pcs