The Fulton Aluminum Universal Fence Clamps are the perfect solution for clamping auxiliary fences, stop blocks, setup blocks, corner clamps and more to vertical flat surfaces like fences without the clamps getting in the way. The clamp post arm fits into a 3/8" hole and is at a slight inward angle to keep the lower part of your fence or block up against a flat surface. Fitting into a hole on the top of the fence or block keeps the clamp completely out of the way unlike F-clamps or C-Clamps. The versatility of these clamps allows you to use them in most any way imaginable to make your work flow quicker and easier.