For telephone craftwork. Connect wires to fuses and tighten nuts on binding post terminals. Place fuses in cable terminals. Double ended 3/8" and 7/16" hex sockets are color coded for quick identification of socket sizes. Design allows use of a wrench for additional torque. Manufactured from high carbon tool steel and heat treated for strength and durability. Sockets are feature thin wall design for access into tight spaces. Rugged high impact extruded plastic handle.