The dimensions are measured manually and there might be a slight margin of error, which is a normal phenomenon. Please be aware of this. Product dimensions: 12*15*27CM Motor speed: 1500 - 3000 rpm Rated power: 120W Power supply voltage: 12 - 24V 5 - 20A Clamping head specification: JTO B10 B12 Rated frequency: 5OHZ B10B12 Gearbox material: Aluminum alloy Applicable drill bit type: Carbon steel drill bit Maximum clamping diameter: 6mm Operation method: Manual Speed adjustment: Fixed speed change Turning control: None