I use it on the perforated board attached to the L-shaped corner desk (GM003). It has a strange shape, and at first glance I didn't know what it was, but when I tried using it I thought it was a well-thought-out design. When you try to hang something on a hook like this that isn't fixed in place, it tends to move around and be difficult to hang things on, but this one has a good balance and is easy to use - it turns towards you when you touch it. It has its quirks, but it has greatly reduced the stress I used to feel when using the S-shaped hooks from the 100 yen store. However, although I found it easy to use, my family members found it difficult to use because there was a knack to it.