钳是一款手用工具，多数被于稳固地拿着对象，或者切断和弯曲坚韧材料，例如电线。通常，钳子包括一个对金属杠杆组装在钳的其中一边末端，钳的钳头位一般位于距离杠杆较短的一边，手柄则位于距离杠杆较长的另一边。这个设计允许手双手运用作钳子的力量被放大，同时相对于人类的手指，钳头能精确地操作对象较小的对象。部分的钳被设计成通用用途，例如尖嘴钳，部分钳则设计成特定用途，例如眉钳。

尖嘴钳：前端像鸟类的嘴一般，取名为尖嘴。

老虎钳：前端较为宽大扁平，可以夹大物品。

斜口钳：前端较为尖锐，专用于剪断物品。

Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. They are also useful for bending and compressing a wide range of materials. Generally, pliers consist of a pair of metal first-class levers joined at a fulcrum positioned closer to one end of the levers, creating short jaws on one side of the fulcrum, and longer handles on the other side. This arrangement creates a mechanical advantage, allowing the force of the hand's grip to be amplified and focused on an object with precision. The jaws can also be used to manipulate objects too small or unwieldy to be manipulated with the fingers.