LimoStudio 20 PCS Photography Backdrop Support Spring Clamp for Background Muslin, Canvas, Paper, Chromakey Screen, Heavy Duty Clip, Photo Studio, AGG1424V2 [20 x] Backdrop Support Spring Clamp 3.75 Inch Long 2 Inch Opening Jaw Multi Functional: Photo Studio / Woodwork / Artwork Rounded Handle for Comfortable Grip