Selens 4.5 inch Heavy Duty Muslin Clamps Clips 9 Pack for Photo Studio Backdrops Backgrounds Woodworking These spring clamps are perfect to hang your backgrounds onto your support system or clamp lights to stands. 11.5cm long with 8.5cm wide pads, Opens to 6.5cm, Tempered steel springs, strong gripping action. Very strong to fit most stands,Rounded handles for comfortable grip. Moveable clamp teeth to hold muslin or objects tightly. Pack of 9 clamps