Keyhole slots are a great way to affix wooden hangings, such as a shelf or picture, to a wall. Edgar Cayce Complete Readings Pdf Download here. But if the mounting screws aren't perfectly level, or spaced exactly the same as the slots, the job can become a nightmare. Here's a solution that works great. I attach short pieces of masking tape to the top of my level and, using the keyhole slots themselves, I mark the locations of the slots on the tape, as shown in Step 1. If I want to center the wall hanging between two objects, I also make a third mark, centered between the two marks.

How Can I Hang a Shelf with No Visible Fasteners? Tessa Miller. 10/18/13 5:00pm. You could use a keyhole router bit to cut keyhole slots in the back to. SELF-CLINCHING FASTENER HANDBOOK. Of the force used to install the fastener. A final test is pull-through.(1) Pull-through is the resistance of a fastener to.