Micro Mini Hand Drill w/3 Bits Small Electric Drill Tool Set Portable USB Power Feature High quality materials It is made of high quality materials, and it is quite sturdy and durable for a long-term use. USB powered This electric hand drill can be powered by USB cable, so it is quite convenient to use it. There is a switch on USB cable for easy control. Specific use It will be mainly used to drill wooden boards, plastic boards, paper sheet (thickness within 10mm) aluminum board and circuit board (thickness within 10mm). Comfortable holdingThis cylinder drill body is designed based on comfortable holding elements, you will have comfortable using elements. Handy carryThis electric hand drill has mini size and it is light weight, quite easy for you to carry it and cope with details well Specifications : Item Weight: 4.2 ounces Material: Metal Color: Black Power Supply: DC 5V Drill Length(not included the drill bit): approx. 110mm / 4.33inch Drill Diameter: approx. 30mm / 1.18inch USB Cable Length: approx. 1.95meter / 6.40inch Suitable Collet Range: 0.7-1.3mm