3/8″ Demi Bull Nose Profile from DTA using the latest in Vacuum brazed technology (VBT) offers aggressive grinding action and long life and without losing the shape of the profile. Used with a 5/8-11 angle grinder or polisher with an RPM target of between 3,000 and 4,000 RPM’s. Use with a wet or dry application. DTA has been serving the tiling, contractors and fabrication markets for over 40 years. Quality is our reputation.