Introduction： This Motor Drill mainly used for PCB and other plastic sheet drilling, the chuck suitable for 1~1.2mm diameter drill. it's small size and low nosie, easy to use . Specifications： Work Voltage: DC 12V No load speed: 13000RPM Current: 500mA Diameter: 27.5mm lenth: 37.8mm Shaft Diameter: 2.3mm Shaft lenth: 14mm Drill Diameter: 1mm Weight:72g For any technical support or suggestion, please kindly go to our forum.