I used oil stones and ceramic stones for years and then switched to diamond for a while which I still use for some quick touch up. I got a Worksharp when HD inadvertantly put them all on clearance and after some consternation on their part decided to honor the "clearance" price (something like $70 if I recall). I also got a discount on a Ridgid belt sander in the process which was their consolation they gave initially when they decided initially not to honor the website price.