Reducing Washers 3/4" x 1/2" - Reducing Washers are Used To Reduce the Size of a Knockout Hole in an Enclosure.Reducing Washers 3/4" x 1/2" features include: Use to reduce the size of the knockout in a steel outlet box or other metal enclosure or cabinet Must use one inside the enclosure opening and one on the outside Galvanized Steel Order Qty of 100 = 100 Pieces Below is more info on our Reducing Washers 3/4" x 1/2"