The piston ring set is made of high-quality 45 gauge steel, which is tough, non-deformable, and has a strong bite, helping you to solve piston installation problems with ease, saving you time and effort. Specification: Brand: BDZMC Name: Piston Ring Compressor Set Color: Black Material: 45 Gauge Steel Size: Adjustable Piston Ring Pliers: 6.69 x 3.94 inch Piston Ring Compressor Pliers: 7.08 x 4.68 inch 13 Pieces Piston Rings Diameter: 2.44-5.71 inch, Height: 1.3 inch Applicable: Most vehicles Features: -Piston ring pliers can help you easily install the piston and rings in the cylinder correctly without damaging or distorting the parts. -Use this piston ring compressor tool set to insert piston rings quickly and save time and labor. -The piston ring compressor set has non-slip rubber handles for a comfortable grip.