These are handy and useful, whenever you can work with the INSIDE of of a project. I have found them to be useful on projects that include but are not limited to: making canvases for painting, frames for highlighting work, raised beds (vegetables or flowers), creating trays and boxes/furniture. These are for small projects, you aren’t going to use them to hold a 6 inch board. The spring is stiff and strong, I wish that I could set the strength. I think that over time they will relax some. The rubber grips are great at protecting the wood from indentations.