【Adjustable Diameter】 Adjustable from 2" to 6.9" with spring mechanism for fine control. Oil lubricate the piston and piston ring before compression; place the piston into the cylinder, tighten the compressor, and gently tap the piston with a rubber mallet while holding down the downward pressure of the compressor.
【3" 4" Piston Ring Compressor】Piston Ring Removal Process, Expansion Piston Ring. Made of spring steel for maximum strength and corrosion-resistant service life, they can be installed and removed without twisting by adjusting the diameter from 2-9 inches.3" Piston Ring Compressor: 53mm-175mm; 4" Piston Ring Compressor: 53mm-175mm.
【Yin Aawaeao Adjustable Piston Mounting Pliers】Our Adjustable Piston Mounting Pliers - Piston Ring Spreader - Expansion Plier Tool for 3/64" to 1/4" Inch Allows for Safe and Fast Installation of Piston Rings with Simple Ring Expansion Piston Mounting Pliers are used for installing and removing piston rings; easy to use, safe and reliable.
【Durable】Made of spring steel for maximum strength and corrosion-resistant life. It's small enough for easy and flexible use and won't take up too much of your storage space.
【A good helper for mechanics】 You can shorten the repair of your car's engine with the help of a piston ring compressor that fits perfectly with the piston and has a positive locking effect, compresses the rings and allows the piston to be installed into the cylinder for fine control and thus shortens the repair of your car's engine.