After looking at ring compressors for atv's and motorcycles online I made this myself for nothing. Since most atv's and mc's have about 3 inch pistons I grabbed a piece of 3 inch abs pipe and cut about a half inch off the end. Then I split the ring in one spot. Now just spread it open and place over the piston and rings. Don't even need to use a hose clamp . Now makes setting the cylinder onto the piston so much easier without having fiddle with compressing the rings with your fingers while at the same time trying to push the cylinder down. After the piston is in the cyl just slide the compressor down the rod and spread it open to remove it from the rod