HEAVY DUTY SPRING CLAMPS CLIP-- Ergonomic design handle, convenient to hold and use. | HEAVY DUTY BACKDROP CLIPS-- Suitable for photography, model making, carpentry, and About 3mm thickness spring, sturdy, high strength, and steady clamping. | CLIP FOR BACKDROPS-- Soft pad can effectively slipping, will not damage your items. | BACKDROP CLAMPS-- Small size, lightweight, easy to carry and store. | CANVAS CLAMPS-- Thickened iron with plating, machinery manufacture, labor savings.