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These are placed every 10 to 12 inches around the back of the frame. They are to hold the plywood backing on. I didn't purchase the specialty screwdriver bit for these brass inserts, so I improvised. The two nuts are tightened against each other, and the insert placed on the tip. The whole thing is put inside a small block of wood with a hole drilled through, which is clamped in place over the predrilled hole. I used a power screwdriver to drive the insert in. Sometimes when I tried to screw it out, the insert wanted to come with it. In that case, I loosened the nuts from one another, and it came out easily.
The inserts are about 3/8 inch deep, because I will be routering a lip into the edge of the wood, for the plywood to rest in.
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|...............| We live in the nick of times.
| Len 17, Wid 3 |
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