“Twin Lock Box”
is a wooden combination lock puzzle box that I designed. I applied the mechanic of my “Tricky opening bottle”
to this box.
This puzzle box has five keys on both side. You must push all wooden keys to correct position for opening the box. After opening the box you can change order of keys and you can make your own box configuration.
I designed an other variant of this box with hidden keys. This variation has a fixed key configuration. You can see my other puzzle box and puzzle designs from my blog “Diypuzzles” and you can find a lot of free plans.