Grabber Cement Board and High Density Sheathing Screws have been specifically designed for use with Cement board and High density exterior sheathing. These exterior grade GrabberGard corrosion resistant fasteners have a .40" (10.5mm) wafer head with nibs to facilitate seating and minimize strip out. Grabber drill point screws are for use for the attachment of these boards to steel from 20 to 14 gauge.