Hubbell 3 in x 2 in Switch Box is 2 27/32 inch deep with one 1/2 inch Knockouts. L clamps are provided for non-metallic sheathed cable (NMSC). Extra wide for ease of GFCI installation. Includes nails to fasten the box to wood stud. Non-gangable and Acceptable for use in 2-hour fire-rated walls.