Dremel 2615294309 Rotary Tool Flexible Coupling This part is compatible with models including; 57261001,850,572610031,572610030,57261007,275-3,395-3,57261006,57261004,285-3,57261003 This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 529430970 Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Dremel This flexible coupling (part number 2615294309) is for rotary tools Unplug the rotary tool before starting the repair