Lisle wrinkle band ring compressors are better! How? One, Lisle wrinkle band compressors cut friction in half so that rings slide in easily and their design keeps them from slipping down into the cylinder. Also, they're cam operated--set the adjustment screw just once for an entire set of pistons. And finally, because of these features, you can insert a full set of pistons in half the time--with half the hassle! Work smarter with Lisle wrinkle band ring compressors. 1 lbs (0.5Kg) shipping weight.