I was never a fan of that one. It never seemed to work. My FIL turned me on to Magic Tap to use on a sharpening stone to sharpen my pocket knife. https://www.amazon.com/Forney-20857-Magic-Industrial-Cutting/dp/B003X3ZKXI/ref=sr_1_1/144-0274452-0830464?ie=UTF8&qid=1521747646&sr=8-1&keywords=magic+tap+cutting+fluid