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Wire Collated VersaPin Coil Pins-ST4100 Tool Only, 1 3/8 x .100 Wire Collated, Gripshank, Wood to Steel Pin; 2M Carton Pin fastening has been commonplace in commercial construction for over 50 years. However, many people still have a hard time understanding how a pin can fasten to steel as securely as a conventional screw fastener. The keys to the performance of the technology are the design of the pin and the driving system. Pins are made of special grades of steel that are hardened with a unique heat treating process making them ductile and extremely strong. When driven into steel with the proper pneumatic tool, their ballistic shape point uniformly pierces the steel instead of drilling it out or tearing it like a common nail. The displaced steel rebounds around the pin to create a strong compressive force on the shank of the fastener. This force, working in conjunction with a specific pin knurling pattern designed for the steel being joined, creates a high friction force that prohibits withdrawal of the fastener from the steel. Each pin is designed for a specific range of applications, matching unique characteristics and performance capabilities to the materials being fastened. When the proper pins are used in the application they were designed for, their holding strength and durability often surpasses that of screws. Organizations such as the Light Guage Steel Engineers Association (LGSEA) and the Steel Framing Alliance (SFA) support the use of Pins as a reliable fastening technology.