They look like Polaris accu-trac. OEM on '05 fusion 900 (I'm sure other sleds too, that's the one I know). That'd be my thought on them. Alot of polaris stuff is interchangeable. Skis, ski loops etc.
I just measured the width at the bolt on my gripper skis is 3 1/8" and the tip looks the same. Don't know if they are all the same but a lot of mine have been the same toe loop.
