Feature●ACCURATE READINGS: The Performance Tool W80580 Compression Tester measures pressure in the combustion chamber as the piston comes up on a compression stroke, providing accurate compression readings quickly and easily.●UNIVERSAL DESIGN: The tapered rubber cone is designed to fit spark plug holes from 10mm to 7/8-Inch, making it a versatile tool for most gas engines, including motorcycles and other small engines.●LARGE COMPOSITE SCALE: The large, easy-to-read composite scale reads both PSI and all metric ranges, ensuring you get accurate readings every time.●CONVENIENT PUSH-IN DESIGN: The handy push-in compression tester has the same scale range as most other compression testers, making it a convenient tool for checking compression on motorcycle spark plug holes.●DURABLE CONSTRUCTION: The Performance Tool W80580 Compression Tester is built to last, with a rugged construction that can withstand heavy use in a garage or workshop.Description The Performance Tool W80580 Compression Tester is a must-have tool for mechanics and DIYers. With its accurate readings and universal design, it is perfect for most gas engines, including motorcycles and small engines. The tapered rubber cone fits spark plug holes from 10mm to 7/8 inch, while the large composite scale reads both PSI and all metric ranges. The push-in design makes it easy to use, and the durable construction ensures long-lasting performance in any garage or workshop. Get accurate compression readings quickly and easily with the Performance Tool W80580 Compression Tester.