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These threaded studs are made of 304 stainless steel, offering advantages such as rust resistance, durability, and a long service life. They are multi-purpose threaded studs with an internal hex socket, allowing for easy screwing using an Allen wrench. Available in 12 common sizes, they allow you to focus on your project without worrying about not having the right screw. You will receive a total of 240 such studs, so you won't need to visit a hardware store to buy adjusting screws for a long time. Neatly packaged and categorized in resealable transparent boxes for easy transport and storage.