Variable speed between 10000-30000 rpm. Innovative twist tip: no need for a key to change the accessory. Reduced vibration and soft grip coatings: better comfort and grip. Allows to do various works thanks to the tips: carve, grind, polish, cut, sand, miscellaneous. Stored in a handy carry case (Lxwxh) : 30 x 15 x 5,5 cm. Tip diameter: 3.2 mm.