Raco 8670 4" x 2" Handy Box, 2-1/8" Deep, 1/2" End Knockouts, WeldedRaco 8670 4" x 2" Handy Box, 2-1/8" Deep, 1/2" End Knockouts, Welded Features: Welded design allows for more working room inside boxRaco 8670 4" x 2" Handy Box, 2-1/8" Deep, 1/2" End Knockouts, Welded Specifications: Box Type: RACO Steel Boxes & Covers Box Family: Handy/Utility Boxes, Covers, Extension Rings Box Category: Handy/Utility Boxes - For Conduit Category: Handy Box Box Depth: 2-1/8" Side Knockout(s): 6, 1/2" Bottom Knockout(s): 3, 1/2" End Knockout(s): 2, 1/2" Bracket Type: No bracket Drawn or Welded: Welded Cubic Inch Capacity: 16.5 UPC Number: 050169006702 Handy boxes, also called utility boxes, are used for convenience outlets, switch boxes, or small junction boxes They are popular for surface-mounted wiring The NEC requires that surface-mounted wiring be protected with a protective covering such as EMT conduit Extension rings provide a means for adding additional cubic capacity or as an outlet box for surface conduit 2-1/8" deep