Designed for field installation on screw cover pull boxes and screw cover Type 3R enclosures (size 16.00 x 12.00 x 6.00 in. or smaller), consolets, pushbutton enclosures and Type 12 screw cover wiring trough. Each package consists of four Type 18-8 sta inless steel screws and four nylon captivating washers. Driver bit must be ordered separately (functions in any handle or socket capable of holding 1/4-in. hex insert bits).