e91e9179_Oscillating_tools___DIYWiki__Blade_Mounting
[Machine] Bosch Multitool [Blade Mounting] 
Bosch do a couple of tools, a green bodied DIY class machine that is mains powered, and a blue "pro" range cordless tool. These have a ring of registration pins that match the Bosch blade patten: Bosch tools can hence use Bosch blades and universal blades.
Oscillating tools - DIYWiki
Blade Mounting