Collets are the most precise way to secure an accessory in a Dremel tool. Enhance the grip of your bits in our multifunction tools with the Dremel collet set. With collets 480, 481, 482, and 483, plus a quick-change collet nut, you can easily use a variety of bits. This Dremel accessory set includes 1 collet nut and 4 collets in different sizes: 0.8 mm, 1.6 mm, 2.4 mm, and 3.2 mm in diameter. The maximum recommended speed is 35,000 RPM. For use with all rotary tools except for the discontinued models 1 and 2, as well as series 1 or earlier discontinued models 260, 270, and 280.