Description: 【Mini Drill Set】: Compared with the manual hand drill, it is more time saving, labor saving, efficient, and precise. (Please Note: It is not suitable for heavy metal or high hardness material.) 【Wide Application】: The DIY rotary tools are suitable for making necklaces, earrings, bracelets, pendants, keychains, models, sculptures, dolls, etc 【Durable Materials】: USB Electric Mini Drill Grinder is made of pp and metal material, sturdy and durable to use. 【Easy Operation】: The portable mini drill is powered by USB cable , flexible and convenient switch. 【Portable】: USB Drill Engraving Tool is 9cmx2.5cm/3.54inchx0.98inch, small size, lightweight, portable and easy to store. Specification: Drill bit Range: 0.7mm-.2mm Supply voltage: 5-6V Size Chart: 9cmx2.5cm/3.54inchx0.98inch   Package Includes: Optional Pacakge: Style A Included: 1 Piece Mini Electric Hand Drill + 2pcs 1.2mm Bits + 1pc 1.0mm Bit + 1x Wrench Style B Included: 1 Piece Mini Electric Hand Drill + 10pcs 0.9mm Bits + 3pcs 1.1mm Bits + 1x Wrench Style C Included: 1 Piece Mini Electric Hand Drill + 2pcs 0.8mm Bits + 2pcs 0.9mm Bits + 2pcs 1.0mm Bits +2pcs 1.1mm Bits + 2pcs 1.2mm Bits + 1x Wrench Note: Please allow slightly errors due to manual measurement and different monitors.