OTC's Piston Ring Compressor makes installing pistons into an engine block trouble free Universal piston ring compressor clamps around piston to compress piston rings during piston installation Adjustable handle provides an effective size range for rings from 2.125 inch to 5.0 inch diameter Size range accommodates most passenger car and light truck pistons/rings as well as many commercial vehicles Crafted from high-grade materials to ensure quality performance over the lifetime of the tool; Similar to J-8037; Made in the USA