Description? D-shape carabiner buckle With screw lock Application: exploring, rappelling, rescue, engineering protection, aerial work Material: Aluminium-magnesium alloy Color: Black Dimension: Approx. 2.2 x 3.78 inch/5.6 x 9.6 cm The Ultimate Tension: 24KN (2400kg) The Maximum Opening: 1.7cm This product has got the CE certification Package Includes: 1 x Screw Lock Carabiner Attention: It is necessary to receive adequate training (knowledge of techniques and security measures) before using the tools. Incorrect use or improper maintenance could lead to serious accidents even fatal. Please read carefully or learn enough knowledge before use