2 Pcs, 4 Square Extension Ring, Converts One Gang to 4 Square, 1-1/2 in. Deep, 1/2 & 3/4 Knockouts, Zinc Plated Steel - Silver
$38.24
1-1/2in deep, 4in square extension rings with (8) 1/2in & (4) 1/2in-3/4in side knockouts, are used to converts handy/utility boxes and 1 or 2 gang rings.