Piston Ring Installer Plier Remover Expander Engine Dismounting Tool Easy Piston Ring Installation: The ABN Adjustable Piston Installer Pliers - Piston Ring Spreader - Expander Plier Tool for Installation 3/64” to 1/4" Inch allows for safe and quick installation of piston rings by simple ring expansion. Built to Last: Constructed from all steel with tapered jaws for a quick and easy installation process. Grip Comfortably: Vinyl-coated handles with nonslip rubber grips that offer safe and comfortable operation for less user fatigue and more productivity. Works on Various Pistons: Designed for use on the most common piston and ring diameters ranging in thickness from 3/64-inch to 1/4-inch (1.2mm to 6.4mm). Easy to Use: These pliers expand or spread rings to insert into the groove and install on a piston; Not intended for compressing piston rings. Used to install and remove piston rings on any engine. FIR products are high-quality Tools, Accessories, and Parts and carry our guarantee of your satisfaction. Please check the image before ordering to avoid mistakes. Easy to use.