Toolcraft to-5434521 spring pins made of spring steel, delivered in a convenient set of 25 pieces. These precision-engineered dowel pins are made from high-quality spring steel, providing excellent elasticity and mechanical strength for reliable fastening applications. The spring steel construction ensures uniform expansion force and secure locking in drilled holes, making them suitable for various industrial and workshop applications. These pins feature a slotted design that allows for controlled expansion when inserted into appropriately sized holes, creating a firm mechanical connection without the need for additional fasteners. The spring steel material offers good corrosion resistance and retains its spring properties even after repeated use. Typical applications include machine assembly, tool manufacturing, automotive components, and equipment maintenance, where removable yet secure fastenings are required. The pins are designed for easy installation and removal with standard tools, providing a reusable fastening solution. The set of 25 pieces offers a practical quantity for multiple projects or replacement needs. Manufactured with precise dimensional tolerances for consistent performance and reliable fit. Suitable for use in metal, plastic, and composite materials where dowel pin fastenings are appropriate. The spring steel construction ensures durability and a long lifespan under normal operating conditions. These dowel pins provide a practical solution for mechanical fastening requirements in professional and workshop environments.