91911-4 is a bottoming die component designed for use with TE Connectivity CERTI-CRIMP hand crimping tools. Bottoming dies are critical elements in crimping production, ensuring proper crimp force is applied to terminals for specified tensile strength, mechanical stability, and electrical conductivity. The die works in conjunction with handle pressure settings to achieve consistent, repeatable crimps. These components are typically used in wire processing and terminal crimping applications where long-term consistency and certification of crimp quality are essential.