Pliers are among the most basic and familiar of handheld tools. They are available in a wide variety of sizes, designed for many different tasks, but the fundamentals remain the same: two lengths of steel riveted together close to the midpoint to create a pivot, with clamps on one side and handles on the other. The clamps may be long and thin and pointed, broad, ridged and heavy duty – or somewhere in between.http://www.workprotool.com/hand-tools/