[Main Function]The engine piston ring compressor tool set is used to insert compressing piston rings for cylinder installation of trucks, tractor, automobile, crude oil, racing engines. Package includes ratcheting pliers and 14pcs interchangeable piston rings set, which can tighten to fit any piston from 2.44inch (62-mm) to 5.71inch (145mm) in diameter [Practical Design]The car clamp pliers can holds the piston rings securely until the piston is reinstalled; The fine-tooth lock enable engine bands to be compressed flexibly in small increments, which can be parallel or perpendicular to the cylinder block for precise compression and quickly insert the piston, saving time and effort [14PCS Piston Ring Sizes]Detailed sizes by-Inches/mm: 2.44-2.55inch/62-65mm, 2.95inch/75mm, 3.15inch/80mm, 3.34-3.38-3.42inch/85-86-87mm, 3.54-3.62-3.74inch/90-92-95mm, 3.93-4.01inch/100-102mm, 4.13-4.25inch/105-108mm, 4.33inch/110mm, 4.44-4.48-4.52inch/113-114-115mm, 4.72-4.84inch/120-123mm, 4.92-4.96inch/125-126mm, 5.12inch/130mm, 5.31-5.39inch/135-137mm, 5.51-5.59-5.71inch/140-142-145mm. Various sizes fit for different types of motors [High-Quality Tool]The squeeze clamp pliers is made of high-quality steel with the handle constructed by steel, wear-resistant, corrosion-resistant, with a long service life [Easy Storage & Carrying]Equipped with a well-designed blow-molded plastic tool box, the engine auto compressor tool is of inlaid storage of piston rings and pliers, easy to carry to various workplaces, without worrying about scattering and losing tools Colour:As shown Material: steel Package Contents: 1 x piston caliper 14 x piston ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.