IJO1390 Features: * Wrinkle band cuts friction in half * Rings slide in easily * CAM operated - set adjustment screw just once for entire set of pistons * Insert a full set of pistons in half the time, with half the work * 3"""" to 5"""" Wrinkle Band Ring Compressor Specifications: * Wrinkle band can"t slip down into the cylinder Wrinkle band ring compressor is 4 ways better - low friction, wrinkle band, CAM operated and faster. When installing pistons back into the cylinder bore, nothing works better than the right piston ring compressor. Eliminates risk of breaking piston rings and piston ring lands. Warranty: * Lifetime warranty does not cover abuse