General description Keyless chucks are designed for quick and easy attachment changes on Dremel rotary tools. This set includes 4 mini quick change chucks that accommodate a clamping range of 0.4-3.2mm, making them versatile for various applications. Technical specifications Total size: 24 x 14 mm Clamping range: 0.4 - 3.2 mm Weight: 0.1 kg Material: Alloy Total length: 23.4 mm Tooth width: 0.75 mm Diameter: 1.4 cm Length: 2.1 cm Compatibility and accessories Compatible with Dremel models: 4000, 400, 3000, 398, 395, 300, 285, 275, 200, 100, 8220, 8200, 800, 780, 770, 7700, 750 Note: Not compatible with model 8050-N/18 due to a short machine shaft. Usage Allows for quick and easy changes of attachment tips. Ideal for various DIY and home improvement projects. Other information Made of all metal and heat-treated for durability. The black rust oxide surface treatment extends the service life of the chucks.