This Left Hand Thread Adaptor M10 x 1.25 enables you to use a standard right-hand thread RAM Ball for the Doubletake Mirrors.
The Left-hand thread adaptors are used on a number of bikes; KTM790 and KTM890, Yamaha WR250, WR450, and a number of BMWs. Check the threads on your bike, if you need the Left-hand thread adaptor you may also want