LimoStudio 4.5 Inch Studio Canvas Muslin Backdrop Spring Clamp This 4.5 inch spring clamp is a versatile and lightweight accessory. The compact size is perfect for securing a number of objects such as plastic sheets, photography backdrops, wood or for use in arts and crafts. They are easy to use and can quickly be re-positioned as needed. The serrated jaws help to provide a increased grip for objects of a larger girth. Adjustable tips provide adequate tension, and protect delicate surfaces from damage. Smooth Clamp These soft tips cling to clamped object's surface without causing damage. The diamond weave design provides extra gripping power, which is especially useful on soft or slippery surfaces such as backdrops, plastic, fabrics, and other smooth surfaces. Flexible Tips Flexible grey tips move and adjust as needed to accommodate irregular surfaces. This gives the appropriate amount of tension based on the object that it is clamped onto, providing a better grip for a more efficient hold. Strong Grip Small saw teeth inside of clamp throat provide extra gripping strength. Tiny serrated edges hold fabric and other surfaces for better staying power.