Made of fine quality material, practical, easy to install and use, wide application range, long service life. Features: High precision, wear resistance, stable performance and long service life. Easy to install and use, complete and practical tool set. DIY tool set can exercise and improve your hands-on ability. Suitable for milling machines, lathes, drilling machines, wood. Specification: Material: Metal Main Color: Silver Type: JTO Preferred Chuck Kit Power Supply: DC 12V 5A-36V 3A Load Speed: 3300rpm / 12V (revolutions per minute) Output Power: 75W 555 Motor Size: 78 x 35mm / 3.1 x 1.4in Round Shaft: 3.175mm (1/8 ) Drill Chuck Size: 50 x 27mm / 2.0 x 1.1in JTO Clamping Range Preferred chuck size: 0.3 ~ 4mm / 0.01 ~ 0.157in Package size: 130 x 100 x 80mm / 5.1 x 3.9 x 3.1in Package weight: JTO chuck kit recommended : 298g / 10.5 oz Package List: 1 x 555 Motor 1 x Support 1 x Chuck 1 x Wrench chuck 1 x connection link 2 x M3 screw