Here is 1 new 14 inch Oregon power sharp chain with replacement sharpening stone part # PS52. 52 drive links.This chain is replacement chain and stone for the 539453 power sharp system. Power sharp is an easy to use precision sharpening system that gives chain saw users the power to sharpen their chain in a matter of seconds with a simple attachment. From dull to sharp in as little as 3 seconds. Portable Precise. Powersharp chain stays sharp three times longer than oregon 91VG chain. Send me a question if you are unsure what your saw uses. We have other chains and sizes and can list them on our ebay store. Pictures are of the actual item. Chain and bar is made in USA-Powersharp attachment is made in china.