High quality: The body is made of high-quality Metal, with forward and reverse stepless speed regulation, no-load to 18000r/min, and chuck clamping range 0.4-3.2mm. Easy to use: Comfortable pen-shaped design, comfortable to hold, like a pen in your hand, allows you to work better and reduce fatigue. Ergonomic streamlined design ensures safe and reliable operation. Application: Suitable for grinding pet nails and fine work such as grinding, polishing, engraving and cutting. It is also your ideal gift choice! Name: Rechargeable Lithium Electric Grinder Rated power: 40W No-load speed: 18000r/min Applicable: Suitable for 18V-21V batteries (without battery) Maximum grinding wheel diameter: 3.2mm Chuck size: 3.2mm Chuck clamping range: 0.4-3.2mm Length: 13.9cm Colour:As Shown Material:Plastic + Metal Package Contents: 1 x Rechargeable Lithium Electric Grinder(Battery not included) 1 x accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.