1、Scope of Use: Stainless steel, ceramics, metal, stone, glass, plastic, wood, jade, aluminum dynamic special angle (Niunian angle) acrylic board and other materials for use. 2、LED Light and 5 Speed: 7V mini cordless rotary tool isequipped with working LED light, 5 speed adjustable, maximum speed 18000rpm. 3、Rechargeable Battery: The battery can be disassembled for charging or installed on the machine for charging using for Android cable. 4、Carving Art: Optional engraving head can be used for milling and cutting on materials such as metal, wood, and plastic. 5、Polishing Wheel: The polishing wheel is used for polishing materials such as metal and plastic parts. 6、Applicable Object: 5 speed 7V mini cordless rotary tool is perfect for ambitious amateur craftsmen. 24 x Head Accessories 1 x Plastic Box 1 x Manual1 x Electric Drill 1 x Battery 1 x USB Cable 1 x Charger  Item Type: Mini Electric Grinder SetMaterial: Copper, ABSWeight: Approx. 254g / 9.0ozPlug: USBGear Speed:1st Gear: 3000min2nd Gear: 6000min3rd Gear: 9000min4th Gear: 12000min5th Gear: 15000minBattery: Lithium Battery x 1, 18650, 2000mAh (Shipped With Matching Battery)