Screen printing Hinge Clamps, also called butterfly clamps, are fabricated from a heavy-duty zinc alloy. They are used for fixing screens when printing. They feature a wide-wing thumbscrew for firmly fastening the clamp to the frame. These clamps also feature positive locking for perfect registration.<br> Features<br> Easy to install and positive locking for perfect registration<br> A loose pin permits quick screen removal.<br> Durable and rust-resistant<br> Parameters<br> Application Thickness of Screen: below 2" (51mm)<br> Height: 3.5" (90mm)<br> Length of Clamp: 2.4" (60mm)<br> Net Weight: 0.44Lb (0.2kg) <br>