Diablo, 3-1/2" 20 grit universal fit carbide grit oscillating sanding plate. Diablo's universal fit oscillating sanding plates feature application specific designs that deliver maximum durability and longer life in sanding applications. A 20-grit sanding plate aggressively removals and shapes materials. Open-coat carbide grit reduces material build-up and clogging for longer life. The blade's universal fit, adapter-free design easily attaches to most tools, with the exception of starlock tools.