ISO 6789-1 replaces ISO 6789:2003 with two-part standard. ISO 6789-1 specifies design and manufacturing requirements. ISO 6789-2 covers traceable calibration certificates
Common SAE sizes include 1/2", 3/8", and 1/4" drives. 1/2" drives are used for heavy jobs with massive nuts. 3/8" drives are versatile for both home and workshop use. 1/4" drives are for low torque jobs with small sockets
Torque is the twisting force that causes objects to rotate. Torque depends on force and distance from rotation axis. Maximum torque occurs when force is perpendicular to lever axis
Side mirrors help drivers see behind and sides of vehicles. Modern cars typically mount mirrors on doors, not wings. Mirrors can be adjusted manually or remotely for different heights. Glass may be electrically heated and include glare reduction features
American manufacturer of high-end tools for transportation industries. Headquartered in Kenosha, Wisconsin. Operates plants in Milwaukee, Elizabethton, Elkmont, Arkansas, and California. Traded on NYSE under symbol SNA
Socket wrench uses closed socket format instead of open wrench. Most common form is ratcheting wrench with reversible mechanism. Invented by J.J. Richardson in 1863