What is the leverage principle of the pliers handle, claw hammer, screwdriver, and wrench?

The Water Supply Management Department of Zhongyuan Petroleum Exploration Bureau is mainly responsible for the water supply tasks of some industrial sites, public facilities and drinking water for oilfield residents in the area north of the Yellow River. At present, a dual-source water supply pattern with the Yellow River water as the main and groundwater as the supplement has been formed. Due to the needs of exploration and development, the Central Plains Petroleum Exploration Bureau has scattered residential areas. In order to facilitate the residents of Oil City, a total of 15 centralized water supply plants (stations) have been built throughout the area. Pliers handles, claw hammers, screwdrivers, and wrenches are all levers. The normal use of the screwdriver should be the axle of the lever type machine. When using it, it is the most labor-saving to hold the handle end. The larger the power arm, the more labor-saving claw hammer. When using the hammer head like a shofar The part that uses nails and the like is a lever tool that uses a lever principle to twist bolts, screws, nuts, and other hand tools that hold the opening or sleeve firmware of the bolt or nut.TPR handle claw hammer.