Designed to fasten the tile backer boards. Washer Outside Diameter:32mm /1.25in; Washer Inside Diameter:5mm /0.19in; Exterior Finish: Galvanized. Beautiful frost pattern for the washers
Professional Washer Design:4 Keyholes for Bonding of Plaster or mortar and Basecoats;2 Tabs for Pre-Spotting Washer into Soft Material Such as Insulation Board;Center Hole will Accommodate corresponding screws.
Screw Length: 40mm / 1.57in. Worked with washer's tabs penetrate the surface of the backer board and temporarily hold the washers in place to enable quick installation of the corresponding screws.
Compatible with Kerdi Shower System as well.
Ideal for Kerdi boards, internal wall, ceiling, gypsum board, wall insulation board, composite board, extrusion board, foam slate, rock wool, drywall, wood, and other materials.