Dremel Universal Adapter Fits All Oscillating Multi-Tools
Oscillating Multi Tools Shank Adapter For All Kinds Of Multimaster Power Tools Starlock Oscillating Saw Blades Adapter - Power Tool Accessories - AliExpress
Bosch Dremel OIS™ OIS001 Adapter for Bosch | Top Dog Tool
Dremel Multi-Max MM35 Corded 3.5-Amp Variable Speed 12-Piece Oscillating Multi-Tool Kit with Soft Case in the Oscillating Tool Kits department at Lowes.com