I modeled this clip for a small wooden box I made. I thought it may be useful for someone.

It is very easy to print. In fact, no support is needed and it prints very fast.

You'll need:

• 1 x M3 x 20 HEX head screw
• 1 x M3 Nylock nut / normal M3 nut with glue
• 4 screws / I use 12 x 3 mm sheet metal screws but you may use another type of screws
  
  screw hole Ø is 4mm

How to install:

After printing all the parts I:

1. Assembled the top clip with a 20mm screw and nut
2. Eyeballed the holes by placing both top/bottom clips in the right place and marking with a pencil.
3. Made small holes ( 2mm Ø ) with Dremel/drill to not split the wood.
4. Screwed everything in place.