Starlock Multitool Adapter™ (Screw-System) - Oslo Tool Company Int.
Amazon.com: Fein MultiMaster Adapter Oscillating Attachment Tool Set for MSX 636, MSX 636-1 and MSXE 636 II - StarLock Mount - 35222927050 : Tools & Home Improvement
63733005010 Fein Supercut Adaptor with QuickIn (Hex to Starlock) - PowerToolSalesUK.com
The Multitool Adapter™
Multitool Adapter™ - Click-In Edition - Oslo Tool Company Int.