The vintage spring steel clamp style piston ring compressor with a 3-1/2" to 4-1/2" range is a rare and sought-after find for car enthusiasts and restorers. Made in the USA by Craftsman, this high-quality tool is designed for compressing piston rings in a variety of engine sizes, providing a precise fit for your vintage vehicle. With interchange part numbers for a wide range of car and truck models, this piston ring compressor is a versatile and essential addition to any automotive toolkit.