OREGON 571037 Chainsaw Chain and Sharpening Stone, Power sharp Replacement for Oregon CS1500 18 in. Chainsaw. The Oregon 571037 Replacement Saw Chain and included Sharpening Stone, PowerSharp, 18 in., is a low profile chain with a 3/8 in. pitch and 0.050 in. 1.3 mm gauge chain, and includes a sharpening stone designed specifically for the Oregon CS1500 chainsaw. It features top-sharpening cutters with depth gauge tie straps and guidance drive links for low-kickback performance, good chip flow, and smooth cutting action, and built-in Lubri-Tec automatic oiling system extends the life of your chain by delivering oil to key parts of the chain so you can work smarter with less downtime and maintenance. The top-sharpening design allows the cutters to be sharpened on the saw, on the job, in seconds. The chisel-style cutters deliver efficient cutting and excellent stay-sharp. Ramped depth gauges and ramped guidance drive links deliver smooth cutting action and low-kickback performance. For use with the PowerSharp equipped chainsaws only, fits Oregon CS1500 corded electric chainsaw.