20Pcs Brass Barrel Hinge Hidden Invisible Concealed Hinges for Jewelry Keepsake Box Cabinet Door Barrel Hinges

Worked like a charm. Replaced failed pot-metal hinges on a tea box.

I purchased these 4mm hidden barrel hinges for a ring box. I scoured the internet for instructions and found none. Here is how I installed them.My box has a ¼” wall thickness. I drilled a 4mm hole in the center of the wall and 3/8” deep. The depth of the hole needs to match the length of the barrel from the pivoting pin to the end. Then I routed a 45 degree chamfer along the hinge side of the box on both the top and bottom pieces to allow the lid to open 90 degrees. The chamfer needs to remove the wood back to the center of the holes. Then I glued the hinges in with a little CA glue.I strongly recommend that you mock up the project on scrap wood as I show in the pictures. I also recommend using brad point drill bits to make sure you hit the exact spot for your holes.

Used one of these 4mm barrel hinges in a very small ring box. Used a 5/32” drill bit and installed with CA glue. The hinge was sturdier than expected for its small size. Happy with the results.

Great price, fast delivery and exactly what I was looking for to use in making small jewelry boxes

The swivel pin in the middle is very light. Use with only small boxes.

If you have not used this type of hinge before I would practice on scrape wood before using. Requires back beveling to open properly. Wanted to try them as hidden hinges but having to have the bevel defeats the purpose for me.

Incredibly poor quality and inconsistent dimensions. Pins missing from many of the hinges, others bind and do not pivot properly. Length and diameter aren't very consistent from piece to piece. From the package of 20, 2-4 of these are actually usable. Don't waste your time with this trash.

well suited for small cabinetry work. The hinges are hidden and sturdy for lightweight woodworking projects