Edelrid Steel HMS Screw

"The HMScarabiner made of hardened steel from Edelrid has been specially developed for the highest demands and is the ideal choice for toprope, mountain schools or similar special applications where extreme continuous loads occur. The carabiner features a keylockclasp, which ensures optimum handling when clipping inand out. In addition, a brass gate ensures increased gate strength, which further underlines the safety and reliability of this carabiner."
"Thanks to its robust construction made of hardened steel, the carabiner is particularly durable and resistant to wear and tear, which makes it perfect for intensive use in demanding environments. Whether climbing indoors or outdoors, this carabiner offers the necessary stability and safety."