Features:Electric Grinder Kit: package including various kind of accessories, such as sanding sleeves, twist drill bits, collet, grinding bits, etc., which meet your different needs.Cordless Rotary Power Tool: built-in 900mAh lithium battery, get rid of mess cord disturb and enjoy freely mobile use.Compact & Portable: ergonomic grinding pen as small as a pen, very convenient to use.5000~15000r/min No-load Speed: 3-speed operation(5000/10000/15000rpm), one key conversion, with indicators for each speed.Wide Applications: suitable for the elaborate job like grinding, drilling, carving and engraving on wood, jade, stone, etc.Specifications:Type: 32pcs Kit / 46pcs Kit (Optional)Material: ABS+SSRated Voltage: 3.6VNo-load Speed: 5000~15000r/min (5000/10000/15000)Battery: 3.6V, 900mAh li-ionMax. Grinding Disc Diameter: 3mmCollet Size: 3.2mmItem Size: 163 * 30mm / 6.42 * 1.18inItem Weight: 120g / 4.23ozPackage Weight: 260g / 9.17oz, 290g / 10.22ozPackage Size: 21 * 8 * 6cm / 8.27 * 3.15 * 2.36inPacking List:32pcs Kit:1 * Grinder1 * Collet1 * Connecting Rod1 * Brush1 * Twist Drill1 * Milling Bit1 * Drilling Bit6 * Grinding Needle7 * Grinding Bit12 * Sanding Sleeve46pcs Kit:1 * Grinder3 * Connecting Rod5 * Saw Blade9 * Twist Drill Bit9 * Grinding Bit10 * Collet10 * Sanding Sleeve