[MAIN FUNCTION] This screen printing hinge clamps is used compatible with fixing screen frame when it is printing Feature a wide-wing thumbscrew compatible with firmly fastening the clamp to the frame.[FEATURES] These clamps also feature positive locking compatible with perfect registration. The material is chrome-plated, it will not be rusted, durable and firm, and it can stabilize the screen without moving.[EASY TO INSTALL] 4 pcs Butterfly Frame Hinge Clamp /DIY Tool Silk Screen Printing Hobby Printer .Easy to install and positive locking compatible with perfect registration.[EASILY USED] Easy to install and positive locking compatible with perfect registration.[APPLICATION] Use to secure your screen frame to a table or work surface.Material:Metalcolour:SilverPackage Contents:4 x Hinge ClampOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.