The Lisle Diesel Piston Ring Compressor is a specialized tool designed for efficiently compressing piston rings during diesel engine assembly or repair. Featuring a spring clutch mechanism, it ensures a secure fit on the piston without the common ratchet problems associated with traditional compressors.

This compressor has an adjustable range from 3 1/2 inches to 7 inches, accommodating various diesel engine piston sizes. Built by Lisle, a trusted brand in automotive tools, it is known for its durability, reliability, and precise performance in professional diesel engine maintenance and rebuilding tasks.