Descriptions: _x000D_ Screen printing hinge clamps, also called butterfly clamps, are fabricated from iron metal, surface plated color. 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. _x000D_ _x000D_ _x000D_ Features: _x000D_ Feature a wide-wing thumbscrew for firmly fastening the clamp to the frame. _x000D_ These clamps also feature positive locking for perfect registration. _x000D_ A loose pin permits quick screen removal. _x000D_ These butterfly clamps are used for fixing screens when printing. _x000D_ Easy to screw it on any flat surface. _x000D_ These screen printing hinge clamps are fabricated from iron metal, surface plated color, durable in use. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Type: butterfly clamp _x000D_ Material: metal_x000D_ _x000D_ Surface treatment: plating colorful zinc _x000D_ Product size: as the picture _x000D_ Weight: 394g _x000D_ _x000D_ _x000D_ Package Included: _x000D_ 2 x Butterfly Hinge Clamp