Finishing/Grinding Disc is intended for metal applications

Time consumed by most tasks within the metalworking industry including weld cleaning and removal, edge breaking, deburring and blending, can be quickly recorded because, in this work, time really means money. Whoever can grind or clean the most, the fastest, and finest, wins hands down and Enduro-Flex Turbo triples its value because it works not only on steel but also on stainless, and aluminium. Expert members of the Walter team sure know this because many have been directly involved upwards of fifty years. And that's why Enduro-Flex Turbo was born!

Enduro-Flex Turbo with its exclusive Cyclone technology combines a unique mixture of abrasive grains with cooling agents that produce the industry's fastest removal rate plus a uniform finish. Together, Cyclone Technology along with exclusive flap geometry, can guarantee a 36 Grit cut rate with a 60 Grit final finish.

From: http://news.thomasnet.com/fullstory/Finishing-Grinding-Disc-is-intended-for-metal-applications-582480