This LAB (manufacturer code: 126S4) universal replacement top pin is a critical component for rekeying and servicing lock cylinders. Designed for use in the .003 inch increment pinning system, it has a length of .126 inch and a standard universal pin diameter of .115 inch. Constructed from brass alloy, these pins feature radius edges and a flat center to ensure smooth operation and prevent master pins from tipping or rolling. They are suitable for a wide range of standard lock types, including those from manufacturers like Schlage, Yale, and Weiser. Each pack contains 150 pins, providing locksmiths and security professionals with the necessary components for precise keying adjustments and maintaining security.