4x4 number puzzle

This is a very nice number puzzle. And have cover which means you can have it in your pocket.Overall zise is just 70x70x13 mmMounting order is same as cutting order from left to right. (base plate, frame with numbers, cover with frame, overcover). So do not need any assembly manual. Very important is to sand with a sandpaper all parts, mostly the cover and number sqare plates.