This two-part protector set has a clear protector that protects the edge of the hole, and a stainless steel protector that protects the rear edge of the drop target slot.
We ship these with the screw tabs unbent. This means that the installation can be done without removing the drop targets. If you need the screw tabs for an installation, bend them carefully with wide-nosed pliers to an angle just a little greater than 90 degrees.
http://www.iobium.com/DSCN2570.JPG (Picture of installation)