Set of 5 Single Pole Double Throw (SPDT) knife switches. Features small screw-type binding posts for easy access to all positions (Note: there aren't holes in the posts). Each measures 2.98" x 1.36" x 1.15" (not including the switch handle). Binding screws have a 3.8 mm diameter and extend 7.7 mm from the base. Plastic construction. Each weighs 1 ounce. Two mounting holes about 0.12" apart.