Portable Mini Small Electric Drills Handheld Micro USB Drill with 3pc Bits DC 5V Features: Mini size, light weight, easy to carry. Powered by USB cable, convenient e. With a switch on USB cable for easy control. Made of material, sturdy and durable in use. Cylinder drill body is comfortable to hold. Mainly be used to drill wooden board, plastic board, paper sheet(thickness within 10mm); aluminum board, circuit board(thickness within 10mm). Specification: Condition: Material: Metal + Plastic Color: Black Power Supply: DC 5V Rated Output Power: 18W No-load Speed: 11000rpm Suitable Collet Range: 0.7-1.3mm Drill Length(not included the drill bit): approx. 110mm / 4.33inch Drill Diameter: approx. 30mm / 1.18inch USB Cable Length: approx. 1.5meter / 4.92ft Weight: approx. 119g Package Included: 1 x Electric Drill with USB Cable(adapter is not included) 3 x Drill Bits(1.1mm in diameter) 1 x Wrench Note: 1. This product is not suitable to drill these material, such as bodhi, thick metal, wall and stone. 2. There may be some error in drilling precision.  3. USB adapter may exist incompatibility. 4. It can not be connected to grinding or polishing machine.