Chinatera 10Pcs Black Heavy Duty Muslin/Paper Spring Clips Photo Backdrop Light Photography Background Clamps Used for clipping paper, canvas and muslin backdrops to a crossbar. Heavy duty muslin clamp with firm grip. Constructed from hard plastic. Toothed area below jaw ends holds round objects firmly. Swivel jaws hold irregular items. Special designed handle provides comfortable grip. Fit most stands. Maximum Inne Jaw Capacity: Approx.30mm