[Application]Great fixture for squaring rings in the bore prior to setting end gaps. Applicable to many cover bore sizes from 2inch to 5inch so that you can consistently and accurately measure piston ring end gap. [Function]With our Universal Piston Ring Shaping Tool to locate the piston rings, you can easily and accurately complete the piston ring end gap setting. It will enhance your work efficiency.The feeler gauge is designed to measure the thickness of tappet clearances, spark plugs gaps, bearing clearances, piston ring gaps and other hard to reach places. [Material]Made of high-quality material with strong corrosion resistance and wear resistance, this piston ring squaring tool is designed to withstand a lifetime of use in any professional or home shop environment. [Notes]Places rings 1inch below the deck to get past head bolt distortion. Easy to use,Simple to use with or without head studs in place,no wrenches or other tools are required. Fully adjustable. [How to Use]Very easy to install. No wrenches or other tools are required. 1. Loosen thumbscrews slightly and insert the three round pegs into cylinder bore until the bottom body of the tool rests flat against the cylinder deck. 2. Slide pegs outward to gently meet the inside of the cylinder bore walls, and tighten thumbscrews. 3. Remove tool and insert piston ring into cylinder bore 4. Use ring squaring tool to push ring down evenly until body of tool is flat against cylinder deck. Color: Black & Silver Material: Aluminum Alloy Package Contents: 1x Piston Ring Squaring Tool 1x Blades Feeler Gauge