Neewer 10-Pack Set Heavy Duty Muslin Spring Clamps Clips 4 1/4 inch for Photo Studio Backdrops Backgrounds Woodworking These spring clamps are perfect to hang your backgrounds onto your support system or clamp lights to stands. Heavy duty metal construction with rubber pads keeps things extra secure and damage-free. 4 1/4" long with 3" wide pads, Opens to 2", Tempered steel springs, strong gripping action. Rubber End Grips keeping things extra secure Max opening 2"