Dottie Fully threaded wedge anchor features zinc-plated finish for longer endurance. It measures 1/2-Inch x 4-1/2-Inch. UNC nut has thread size of 1/2-13-Inch and thread length of 3-1/8-Inch. It has 1/2-Inch drill size and 3/8-Inch x 3-3/4-Inch screw size.