What makes the Square Perfect clamps so special? Quality and Performance! Square Perfect only supplies the highest quality photo clamps. We have searched the world over and partnered with a factory which utilizes the best composite material which results in a heavy duty, durable, clamp that will be around for years to come. Every product we sell is designed with the photographer in mind. SPECIFICATIONS: 12 High Performance Clamps Included Innovative Movable Teeth for Ultimate Flexibility and Tension Essential Item in Any Studio Setup Material: High Grade Nylon Light Weight and Easy to Use Heavy duty muslin clamp with firm grip Perfect for clipping paper, canvas and securing muslin backdrops to a crossbar Extra Strength Toothed area holds round objects firmly Swivel jaws hold irregular items Ergonomically designed handle provides comfortable grip 4" Long, 3" Wide 100% Satisfaction Guarantee WHY SQUARE PERFECT? As you know, there are a million choices and just about as many sellers touting their clamps as the best. One thing to note is the size of the clamp and the quality of the material. Although our clamps may be slightly more expensive, they offer more durability and performance than the cheap imposters. Check out our product reviews and you will see the Square Perfect difference.