Attributes . Gangable design offers the option of constructing a box to hold two or more devices; available in 2-1/2" & 3-1/2" depths; patented TKO 1/2" & 3/4" eccentric knockouts (Per U.L. 514-A, suitable for use without a bonding jumper in circuits above or below 250 volts); device ears formed inside the box, preventing mortar from getting in the device holes; standard wall plates cover box opening . Names