Knockout Size

1 in
1-1/8 in, 7/8 in
1/2 and 3/4 in
1/2 in
1/2 in, 21/32 in
1/2 in, 3/4 in
1/2 in, 3/4 in, 1 in
1/2"
1/2, 21/32 in
1/2, 3/4 in
13 mm
20 mm
20mm
3/4 in
Expandable Knockouts
Knockout Size