DURABLE Speedball Hinge Clamps are made from rust-resistant, cast aluminum. They enable you to convert any table into a screen-printing press. Ideal tools for block ink printing and screen printing kit. Print making supplies DESIGN Made of rust-resistant zinc alloy Speedball screen printing hinge clamp screw set features wide-wing thumbscrew for firm fastening to frame, and positive locking for perfect registration when printing. Heavy duty clip for screenprinting press IDEAL Screen Clamps are sold as a pair and are a basic way to begin screen printing, simply screw or bolt the pair of hinges to a work surface, table, desk or work station and screw clamp your screens in place CONTAINS Pack includes 2 hinge clamps and 4 screws. Everything you need to create your own diy screenprinting press work station. Once finished simply unscrew and remove BRAND Speedball’s rich history of manufacturing fine art and craft tool began in Camden, NJ in 1899. Speedball’s offerings have grown but their dedication to providing customers with superior products at an affordable price remains the same