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A double end stud, as its name implies, is a type of fastener that features two threaded ends with a unthreaded shank in between. This unique configuration allows it to serve as a versatile connector in a range of applications. Historically, the design of the double end stud emerged from the need for robust fastening solutions that could withstand significant stress and load. Its origins can be traced back to the industrial revolution when the demand for durable and reliable construction materials surged as industries expanded.

2. Expansion Screws These screws are designed for concrete or masonry walls. When installed, they expand and grip the surrounding material as the screw is driven into it, creating a robust anchor point.

Self-drilling screws, also known as Tek screws or self-tapping screws, are engineered with a drill bit tip that allows them to penetrate materials without the need for a separate drilling operation. This feature is particularly advantageous when working with thick steel, as it reduces the time required for assembly and helps ensure a secure, tight fit.