I have never used these Mandrels. I received them with the Hightower Deluxe lathe that I purchased last year. I'm not going to be building cues for a while, and if I do, I'll be using other pins. I'm in Willoughby Ohio. Just east of Cleveland by about 1/2 hour. I do not have any other pin mandrels at this time. The cue maker I purchased the lathed off of used them, but they don't look like they were used very much. They are used for sanding your finish down to size. When your finish is sanded flush to the mandrel, then it's to size. Thanks.