Toolcraft expansion pins, manufactured according to DIN 1481 standards, are precision-engineered components for secure fastening applications in mechanical assemblies. These expansion pins measure 28 mm in diameter and 90 mm in length and are made from high-quality spring steel, ensuring reliable performance and durability under demanding conditions. The robust design provides increased strength and stability for applications that require powerful fastening solutions. Each package contains 10 identical expansion pins, allowing for multiple installation points or replacement needs. These components are particularly suitable for bicycle headset assemblies and other bicycle applications where precise fit and secure mounting are crucial. The spring steel construction offers excellent resistance to deformation and maintains clamping force over extended use. The standardized dimensions ensure compatibility with corresponding mounting holes and facilitate straightforward installation. These expansion pins are designed for use under vibration and dynamic loads, as commonly encountered in bicycles and outdoor recreational equipment. The matte surface provides corrosion resistance while maintaining dimensional accuracy. Suitable for professional workshops and DIY enthusiasts who need reliable mechanical fasteners for bicycle maintenance and repair tasks. The consistent quality and precise manufacturing tolerances ensure predictable performance and ease of handling in various assembly applications.