Parametric S-Hook

Sometimes you need an S hook. Sometimes you need an S hook that is a very specific size. Sometimes you need an S hook that has a specific opening. Sometimes you need such specific S hooks that you spend the time to write a scad script to generate S hooks for you. Sometimes it is too early in the morning and you haven't had coffee yet and you keep writing formulaic sentences about S hooks instead of writing the code that your boss wants you to. Sometimes.

Update:
WilliamAAdams simplified