Dust Collection DMULN The Dust Muzzle Ultra Leatherneck for 7/8-inch Grinders Fits virtually 7-8-inch electric right angle grinders with round bearing housings. Excellent for diamond cup wheels, Zec wheels and thin backup pads Works well with sanding discs and soft pad sanders Up to 95-percent efficient when used with a 2hp industrial vacuum system Installs in Minutes