Works on all ½” wedge anchor bolts and L style bolt sets. The breakaway nut is installed with regular tools, including socket wrenches. Upon tightening, the tamper resistant removable (hex) nut heads shears off, leaving the 5/8” wide conical base to protect your property. Use these to reduce the risk of the unwanted removal of mailboxes and pedestals in public or private spaces. Also works to protect signs, lighting fixtures, and displays. Made from aluminum, these lightweight, corrosion resistant tools are nonmagnetic and great for wet environments. The tamper resistant removable nut (hex) heads will work on all ½” wedge, anchor, and L style bolts (for wet concrete).