Specifications:It Is Necessarily Important For Professional Photographers To Own Well-Qualified Backdrop Clamps.Steel Pivot And Spring Inside Promise The Durability Of This Product.Movable Clamp Teeth Are Able To Hold Auxiliary Photographic Equipment Tightly, Even Some Smooth Objects.Non-Slip Patterns Rounded Handles Can Increase The Friction Force And It Is Comfortable For Users To Hold.The Nylon Backdrop Clamp Applies To Most Products.Specifications:Max Jaw Opening: 1"/2.5Cmlength: 2.5"/6.5Cmquantity: 20Pcspackage Contents:20 X Backdrop Clamp