Made of fine quality material, practical, easy to install and use, wide application range, has a long service life. Features: High accuracy, wear resistance, stable performance and has a long service life. Easy to install and use, the tool set is complete and convenient. DIY tool set can exercise and improve your hands-on ability. Suitable for milling machines, lathes, drilling machines, woodworking machines. Specification: Material: metal Main color: silver Type: B10 drill chuck kit, JTO drill chuck kit (optional) Power supply: DC 12V 5A-36V 3A No load speed: 3300rpm / 12V (rpm) Rated output power: 75W 555 motor size: 78 * 35mm / 3.1 * 1.4in Round shaft: 3.175mm (1/8") Drill chuck size: 50 * 27mm / 2.0 * 1.1in B10 drill chuck clamping range: 0.6~6mm / 0.02~0.24in JTO drill chuck clamping range: 0.3~4mm / 0.01~0.157in Package size: 130 * 100 * 80mm / 5.1 * 3.9 * 3.1in Package weight: B10 drill chuck kit: 380g / 13.4ounce JTO drill chuck kit: 298g / 10.5ounce Package list: 1 * 555 Motor 1 * Bracket 1 * Drill Chuck 1 * Chuck Key 1 * Connecting Link 2 * M3 Screw