So, when it comes to smarter multi-tool ownership, it would clearly make sense to simply grind a "new" set of teeth for all those dull or worn-out pre-formed cutting blades. And, you bet, this is precisely what - as all our existing customers have already found - can readily be accomplished with the simple and incredibly useful SHARP POG product. With drill speeds on the order of around 1,100 RPM, the SHARP POG and its patented cylindrical grinding profile works to ensure that a "nicely refurbished" multi-tool blade - or 1- with "Piranha-like teeth" - can be accomplished in several minutes or so. To be clear, there is serious time and money to be saved by regular use of the SHARP POG - and safe operation of the patented device (US 10,406,616) is unusually easy. Material: Aluminum.