A cable tool is a type of drilling equipment used primarily in the oil and water well drilling industries. It operates by using a heavy drill bit attached to a cable, which is repeatedly raised and dropped to break up the rock or soil. This method is effective for reaching deep underground sources of water or oil. The cable tool system consists of several components, including the drill bit, drilling cable, and pulley system. It is known for its durability and ability to work in various geological conditions. While newer technologies like rotary drilling have become more common, cable tools are still valued for certain applications due to their simplicity and reliability.