Starlock adapter - makes your universal / OIS12 blades compatible with machines from Bosch and Fein - YouTube
Bosch Oscillating Tool Universal Adapter at Lowes.com
Ocillating Multi Tools Shank Adapter For All Kinds Of Multimaster Power Tools Ois Starlock Oscillating Saw Blades Adapter - Power Tool Accessories - AliExpress
OIS Universal Adapter - - Amazon.com
Bosch Universal Oscillating Multi-Tool Adapter OIS001 - The Home Depot