5 Pcs, 4" Square Extra Shallow Junction Box, 1-1/4 In. Deep, (12) 1/2 In. Side Knockouts, 0.0625 Galvanized Steel for Lighting Fixtures, Switches, Receptacles Or Outlet Devices - Walmart.com
4 in. x 2 in. Handy Box, Drawn, 1-1/2 in. Deep, Eight 1/2 in. KO's, B Bracket | 655 | Raco
Raco 8650 4" x 2" Handy Box, 1-1/2" Deep, 1/2" End Knockouts, Welded - Electrical Boxes - Amazon.com
Steel City 58361-1/2 :: Handy Box, 1-7/8" Deep, 1/2" KOs, Drawn, Steel :: Rexel USA
RACO 1-7/8 in. Deep Single-Gang Drawn Handy Box with 1/2 in. Knockouts (50-Pack) 8660
Hubbell-Raco 660SM 1-7/8-Inch Deep Handy Electrical Box with 8 x 1/2-Inch Knockouts and Drawn with Ground Wire, 4-Inch x 2-Inch - Electrical Boxes - Amazon.com