Disassembly, connection and assembly devices  

Fastening and Loosening Tools are essential components in mechanical workshops, construction sites, and manufacturing lines. These tools are categorized by their power source, the amount of torque (rotational force) they provide, and the specific type of fastener they handle. 1. Manual Tools Used for tasks requiring high precision, control, or in areas where power sources are unavailable. Wrenches (Spanners): Includes open-end, ring, and adjustable (Crescent) wrenches. Socket Wrenches (Ratchets): Used with detachable "sockets" of various sizes. The internal ratchet mechanism allows for fast tightening without removing the tool from the bolt. Screwdrivers: Available in various tips such as Flat-head, Phillips (cross), and Torx (star). Allen Keys (Hex Keys): Used to drive bolts and screws with hexagonal sockets in their heads. 2. Power and Cordless Tools Driven by electric motors or batteries to save time and reduce physical effort. Impact Wrenches: Deliver high torque output with minimal effort by the user. They are the industry standard for removing lug nuts or heavy industrial bolts. Cordless Drill/Drivers: Versatile tools for light fastening and drilling. Most feature a "clutch" to control the amount of torque applied. Electric Screwdrivers: Often used in electronics and precision assembly lines for repetitive, low-torque tasks. 3. Pneumatic Tools (Air Tools) Powered by compressed air, these are preferred in professional automotive and industrial settings for their power-to-weight ratio and durability. Air Impact Wrench: Known for the "rattle" sound in auto shops; used for heavy-duty loosening and tightening. Air Ratchet: Designed to fit into tight engine compartments where a standard wrench cannot swing.