Aloha Gang, Got these a while ago when all I had was my old Craftsman 4 x 36 belt / disc combination... gotta tell you it works like a charm... Most folks probably have a 4 x36 of different makes and models... this little attachment greatly improves the performance and function of that... for a variety of tasks like sharpening those old tools, hatchets, axes, etc... and getting a nice convex edge on them fast and simple.... Well cleaning out the shop and forgot I got 3 of them way back when... my 4 x 36 is gone since I got my KMGs and Bader... So offering them up here to help folks out... Here's the link to learn all about it.... Convert your stationary belt sander for slack belt use with no tools or modifications $40 each plus $11 shipping Priority Insured with tracking to the USA only.... Thanks a bunch for looking... Have a great day all! Take Care and God Bless, Bear