Easy to use. You can use the spring pliers to easily open the tip, just place the spring clamp onto the mitered corner you need to secure, then release the clamp so the tips pierce into the wood to hold the parts together. It can be done in just a few seconds.Then,let the glue dry or nails the corner joints together.It can be opened to 2 inches so they cover most trim sizes. Perfect for woodworking enthusiasts,carpenters, contractors, hobbyists and more. When you making picture frames,moldings,wood trim work,and any compound miter,the biggest trouble in gluing up mitered corners is keeping them from opening up.Now, it is time to give up those cumbersome and expensive parallel clamps. The professional Miter Spring Clamps provides you with the ideal and cost effective mitered corners clamping tool to help you get your project get done in a more efficient manner. Unlike other available spring clamps, the uniquely designed tip is designed to pierce the wood,so that there is minimal visible evidence of the clamps being used after you remove them. This prevents the clamp clip from cutting, pushing, or tearing on the wood, thereby Leaves appearance flaws that are difficult to repair. Although they leave small in the wood, but they can be filled or sanded out in finishing. Details determine quality! The clamps are designed with no gaps, and can be used for pocket-sized projects. It can be opened to 0-2 inches so they cover most trim sizes., Weight: 0.81350574678 Pounds, Manufacturer: Aboiled