Features: Pliers with selected the piston ring-set bands for easy piston insertion into your cylinder.can be used on trucks, tractor, automobile, diesel, racing engines etc.Tool kit comes in durable carry case ,and pliers can be used parallel to the cylinder block.Set works by placing a band around the piston, covering the rings and hooking pliers into the band and squeezing.With the band tightly around piston, insert piston into cylinder and tap lightly with hammer handle to install. Specification: Suit for piston diameter: 62mm - 145mm (2.44" - 5.71") Pliers shank diameter : 9mm/0.35" Width of piston ring: 32mm/1.26" Length of plier: 185mm/7.3" Item Weight: 1.5kg/3.3lb Package Size: 26.5*21*5.5cm/10.4*8.3*2.2inch Package include: 14pcs Piston Ring Compressor 1pc Plier 1pc Carry Case