Features: Mini and compact, easy to control with one hand, easy to operate. Designed of angle plate for easy alignment of chain saws, fine grinding and more accurate positioning. High temperature resistance, fast heat dissipation, high hardness and long service life. The chuck has a better locking force and is easy to replace the grinding units. It can be connected to a 12V mobile power supply to work. It is easier to use without removing the chain during grinding. Specifications: Material: plastic+metal Color: blue+black Power voltage: 12V Power: 55W Max grinding rotation: 25000rpm Grinding unit quantity: 3pcs Grinding unit diameter: 4mm (5/32"), 4.8mm (3/16"), 5.5mm (7/32") Cord length: Approx. 1.8 meters Grinder total length: 200mm / 7.9in Package size: 205 * 70 * 67mm / 8.1 * 2.8 * 2.6in Package weight: 405g / 0.9lb Package list: 1 * Mini Grinder 3 * Grinding Unit 2 * Wrench 1 * Pack of Tool Accessories