1/4 IP, Brass Finish, Screw Collar Loop Kit, Used To Mount Light Fixtures To Junction Box, Requires A Canopy With 1-1/16" Center Hole, Includes 1 Each Of The Following: 4" 1/4 IP Flat Crossbar, Screw Collar Loop, 1/4 IP Lock Nut, 3/8 IP Lock Nut, 1/4 IP x 3/8 IP Hickey, 1/4 IP x 1-1/2" Nipple & 2 Each 8-32 x 1/2" Mounting Screws.