【Replacement for Dremel 4486:】 Only suitable for Dremel rotary tool models 275, 285, 398; Also suitable for models 750, 770 and 781 【Compatible with:】 Use with rotary tool models : 4000, 400, 3000, 398, 300, 285, 275, 200, 100, 8220, 8200, 800, 780, 770, 7700, 750 【Size:】 Clamping Range: 1/32 - 1/8 inch Maximum RPM: 35.000 1/min Length: 23.5mm Diameter: 14mm Color: Black 【Easy To Use:】 Easy and quick to change accessories replacement on multi tool without changing collets 【Specifications:】 Quick change chucks Only fit for Dremel rotary tools, NOT fit for other rotary tools It makes it easy for you to work, change the chuck diameter, and make a durable product Ideal for light-duty accessories including drill bits, sanding drums, polishing wheels, wire & bristle brushes, and cut-off wheels 【Package Included:】 5 x Quick Change Keyless Chucks