Screw Up is a cute little puzzle, by Puzzle Potato, where the aim is to free the brass ring. The ring is trapped by three pieces of Perspex and a nut and bolt going through the middle. The nut and bolt is secured in two pieces of wood so that the nut cannot be undone.
Artistic Ratings
The ratings I have chosen for this puzzle is 6,7,7. The puzzle is pleasant to look at and is well designed.
Solution (Spoilers - click to reveal)The piece of wood at the top of the puzzle has section that can be rotated. Once rotated the bolt will drop allowing the nut to be unscrewed.