Quick facts
- Brand: MR CARTOOL
- Price: USD 22.29
- Rating: 4.00 (143 reviews)
If you’re rebuilding or servicing an engine, the MR CARTOOL Automotive Piston Ring Compressor Tool Set is designed to make piston ring compression and cylinder installation more manageable. The kit includes one specialized pliers and 14 piston rings in different sizes, helping you match common piston diameters without piecing together separate tools.
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Built with manganese steel and iron components (with plier handles constructed with forged steel), this set is aimed at hands-on automotive work in the garage or shop. A fine-tooth lock allows compression in small increments for better control during installation. Everything stores in a blow-molded toolbox with inlaid storage to reduce wear and make the kit easier to carry between job sites.
Fit range: suits piston diameters from 62–145mm (2.4–5.7 in). Note: the manufacturer states this piston ring tool is not suitable for tractors.
- Wide piston diameter coverage: 62–145mm (2.4–5.7 in) with multiple included ring sizes
- Includes 1 specialized pliers + 14 piston rings, stored in a blow-molded carrying case
- Fine-tooth lock for compressing bands in small increments during cylinder installation
- Durable build: manganese steel and iron, with forged steel plier handles
- Designed for use on sedans, trucks, and racing engines (not suitable for tractors)






