The Woodruff Key 5/16 x 1-1/4 from Double HH Manufacturing is a crucial component for ensuring effective torque transmission in machinery. This pack contains 100 keys, crafted from high-quality steel for enhanced durability. With a width of 5/16 inch and a length of 1-1/4 inches, these keys are suitable for a variety of applications, including automotive and industrial machinery. Their precise dimensions ensure a snug fit, reducing the risk of slippage and enhancing operational efficiency. Ideal for professionals seeking reliable performance in mechanical assemblies.