They are typically made of steel or cast iron, at the bottom is a threaded hole through which a large threaded screw protrudes, one end of this screw contains a flat edge of similar size to the one at the top of the frame, and the other end usually a small metal bar, perpendicular to the screw itself, which is used to gain leverage when tightening the clamp . A G-clamp is used by means of turning the screw through the bottom of the frame until the desired state of pressure or release is reached.
Clamps are tools designed to hold and secure two objects tightly together and to prevent unwanted movement while e.g. clamping/glueing, holding work for sawing/drilling, and positioning work for fastening.
Clamps are widely used by:
• Carpenters
• Mechanics
• Plumbers
• Electricians
• Constructors
• Builders
• Architects
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