With Carabiner: A carabiner is included, these screwdriver bit extension bars can be attached to backpacks, safety vests, pants, tool boxes, etc. to prevent accidental drops. Non-slip design: With it, you can even replace the bit you need with just one hand, helping to ensure safety in high-altitude operations. The non-slip texture on these adapters makes assembly easy Wide application: the tools are used to extend and change various screwdriver bits, the standard 6.35mm hex socket is suitable for standard size screwdriver bits , such as drill bits, screwdrivers, bits, Package Content: You will receive 5 pieces 6.35mm screwdriver bit holders in 5 different colors and 1 metal carabiner. The quantity is enough for daily use and working needs. Sturdy and Strong: The extension bars are made of high carbon steel and are durable, lightweight, wear resistant and solid to guarantee their longevity.