2Pcs Butterfly Hinge Clamp for Silk Screen Printing Frame Screen Printing Clamps DIY Hobby Tool for Fixing Screen Printing Mesh _x000D_ These screen printing hinge clamps are made of zinc alloy, chrome-coated surface, they are durable and rust resistant. _x000D_ The clamps feature two holes that you screw directly into your workbench and wide-wing thumb screws to secure your frame (screws is not included).These clamps also feature positive locking for perfect registration. _x000D_ The screen print butterfly clamps are used for fixing screens when printing. It can hold all wood or metal screens from 0.5" to 1.8" (12 to 45 mm) thick, Height: 3.3" (85mm), Length of Clamp: 2.4" (60mm) They are used to secure your screen frame to a table or work surface, easy to install and positive locking for perfect registration. _x000D_ They are used to secure your screen frame to a table or work surface, easy to install and positive locking for perfect registration. _x000D_ For starters, new beginners to learn how to screen printing. The screen printing hinge clamp is the fastest way to build a printing press. _x000D_ _x000D_ _x000D_ Used for fixing screens when printing, Making screen printing so much easier! _x000D_ _x000D_ How to use: _x000D_ 1--Take a flat wooden board and draw a straight line on the board. _x000D_ 2--Take two points in a straight line, fitted with butterfly clip, according to the need to install a parallel or a few pairs. _x000D_ 3--Installed on the screen, good printing position, locking chuck, flip up and down, flexible and unobstructed screen, you can put into use. _x000D_ _x000D_ Specifications: _x000D_ Material: zinc alloy _x000D_ Color: Silver, Colorful _x000D_ Surface Treatment: chrome-plated _x000D_ Parameters Application Thickness of Screen: below 1.77" (45mm) _x000D_ _x000D_ Package Included: _x000D_ 2 * Butterfly Hinge Clamps _x000D_ _x000D_ _x000D_ _x000D_