Leviton Pull Chain Lampholder 600 W 250 V Medium

Base measures 1-3/4 inch wide by 5 inch long, which allows for mounting on beams, joists or studs as narrow as 2 inch. Two No. 8 wood screws are furnished to hold base on 3-3/16 inch centers. Use with 2 or 3 wire, #12 or #14 nonmetallic sheathed cable.