61A Fine Mini CUT Lab Carbide BUR 1/Pk. DIAMOND CUT carbide BUR for minimum Reduction . Can be used on acrylics, composites, porcelain or metal for a smooth finish. When searching for KEYSTONE Dental products, if you are not able to find the KEYSTONE Dental product you are looking for. Let us know, we will contact KEYSTONE Dental products and bring what you are looking for.