Are Fin Blocks interchangeable between ski brands ?

[swbca]

Are the inserts for the fin blocks standardized like the inserts for bindings ?  I don't have a wall covered with used skis to figure that our for myself.

 

 

[Horton]

 

HO & Radar fin blocks are interchangeable and also fit Denali and Parsons. I think LaPoint also takes a HO/Radar clamp.

Connelly / D3 / Goode / Reflex each have unique clamps do not fit any other skis.