Starlock Multitool Adapter™ (Screw-System) - Oslo Tool Company Int.
Herkules Vielzahn-Adapter für Bosch/Fein Nr. M4000
More About The Bosch & Fein Starlock Oscillating Multi-Tool Accessory Interface
Ocillating Multi Tools Shank Adapter For All Kinds Of Multimaster Power Tools Ois Starlock Oscillating Saw Blades Adapter - Power Tool Accessories - AliExpress
Amazon.com: Bosch 2609256983 Adapter : Tools & Home Improvement
The Multitool Adapter™
Fein Starlock Oscillating Multi-tool System Explained