Features: Multi function Handheld rotary tool small in size and lightweight comfortable in grip great for cutting engraving drilling sanding grinding and polishing. Adjustable speed Built-in stepless adjustable rotate speed of up to 12000r/min can be adjusted freely to suit your different needs. High performance Equipped with copper motor with high concentricity to provide stable speed and greatly improve the working efficiency. Exquisite workmanship The heat dissipation window design can effectively dissipate the heat generated by the operation of the generator and extend the service life of the motor. Safety assurance Designed with splicing power supply which can be easily cut off when there is needed during work. Specifications: Material: plastic+metal Item Color: gray Plug: US Power Supply: DC 12V/2A Rated Power: 12W Load Speed: 12000r/min No-Load Speed: 12000r/min Clamp Range: 0.5mm-3.2mm/0.02-0.13inch Size: 3*16.5cm/1.18*6.48inch(D*H) Weight: 250g/8.82oz