Dremel Collet Nut Kit - DRM-4485 - PCH Parts Express
Mounting nut for Dremel Tool | 3D CAD Model Library | GrabCAD
Amazon.com: TJPoto Pack of 2 Square Holed Nut Collet Flex Shaft Driver Cap Nut For Flex Shaft, Mini Saw, Right Angle Attachment Replacement Part For Dremel
Dremel 4485 Quick Change Rotary Tool Collet Nut Set Medium - Power Rotary Tool Accessories - Amazon.com