This professional hockey puck has served it's purpose on the ice, but it lives on in the jewelry studio. Hockey pucks make excellent rubber bench blocks. They are sturdy and firm, but still offer a bit of spring if needed. We have found that the rubber blocks are typically cut out square, which throw a cattywompus on everything you do with them. Use as a brace to sand and file leatherhard and fired metal clay and any other metals. Won't damage files. Also is a fabulous worksurface for dry assembly.