7pcs/set 2.35/3.17/4.05/5.05mm Brass Dremel Collet Mini Drill Chucks For Electric Motor Shaft Drill Bit Tool Drill Chuck Adapter - Power Tool Accessories - AliExpress
Dremel Collet & Nut Kit in the Rotary Tool Attachments & Batteries department at Lowes.com
Collet Set for Dremel, 10Pcs Replacement 4485 Brass Quick Change Rotary Drill Nut Tool Set (1/8" x 2, 3/32" x 2, 1/16" x 2, 1/32" x 2) - - Amazon.com
Buy DREMEL 482 Collet, Quick-Change, Metal, For: All Rotary Tools