The Dremel bit set is compatible with Dremel cordless and corded rotary tools, except for the discontinued Models 1, 2 and Series 1, or earlier versions of discontinued Models 260, 270, and 280. 4486 Keyless Chuck: The 3-jaw keyless chuck for Dremel 4486 Rotary Tools 3000 4000 4300 7700 8220 Part has the stable and durable built-in spring. 4485 Brass Collet:8pcs 4485 brass collets with 1/32 to 1/8 shank sizes (0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, and 3.2mm). Drill Chuck Collet Set for Dreel, 11 Pcs Replaceent 4485 Brass Quick... This replacement drill chuck collet for Dremel not only can improve the accuracy of installation and use, but also maintain the stability of work efficiency. 4-claw design of the brass chuck to hold accessories more stable. HARFINGTON 11pcs Brass Collet 0.5-3.2mm M7 Brass Drill Chucks Mini Electric Grinder Quick Change Drill Chuck Bit Sets for Rotary Tools, 4.2mm Shank Dremel Chuck Drill Chuck Collet Set For Dremel, Include Brass Collet Set & 1/32" To Dremel Collet Set M8 Metal Change Collet Nut: This replacement collet nut not only can improve the accuracy of installation and use, but also maintain the stability of work efficiency. Bacode poduct info and images fo UPC 745061143821 (New Mecuy Mecuise Quicksilve Oem Pat 11-40138 6 Nut The Dremel bit set is compatible with Dremel cordless and corded rotary tools.