Corrosion resistant – All Tapcon® fasteners are protected against rust and corrosion by the exclusive Stalgard® finish. Fast – Install two or three Tapcon fasteners per minute. Simple two-step operation – drill, then drive – eliminates the need to set anchors. Strong – Tapcon fasteners and the masonry material are mechanically linked for exceptionally strong pullout strength.. Removable – Tapcon fasteners can be removed and reinserted in the same hole. Great for repairs or adjustments. Made in USA.