Clamp for workbench

This is a simple workbench clamp. I was ordering some metallic ones which will be needed some welding as well, but couldn't wait till those get delivered. So I decided to design one, which fits my needs.
The need was to have a clamp which is always on my mini workbench to quickly hold down things, mainly wood, but also I should be able to quickly release it without completely remove it from the workbench.