I don't think this hollow grinding attachment has ever been used. I got it along with some knife making equipment I purchased. I'm pretty sure it's for the KMG grinder but easily adaptable to most any grinder. It has the elevator attachment already mounted on it. Also included in this deal is a tapered tang attachment, that is missing a couple of small pieces according to the picture on Jantz's site. Looks like all this together is approx. $500 from Jantz. I'll take $275 Shipped conus paypal ok. email richtrix@triad.rr.com Thanks, Richie