Mirka Backing Pad Wrench/Spanner is the standard spanner which comes with all new 77mm, 125mm and 150mm Mirka sanders.

It is designed to fit between the sander body and the backing pad, enabling the backing pad to be easily changed.  Compatible with DEROS, CEROS, ROS and PROS sanders.

Mirka Part No:  24mm to fit 125mm and 150mm Sanders

Mirka Part No: 17mm to fit 77mm Sanders.