Description: Heavy duty twist gate auto self locking O shape carabiner Designed for mountaineering and sport rock climbing in general Extremely multipurpose and durable Application: Rock climbing, mountaineering, caving, exploring, rappelling, rescue, engineering protection, aerial work, outdoor, camping, fishing, traveling, keychain and so on The product has got CE certification Specification: Material: Aluminum-magnesium alloy Size (L x W): Approx. 10.8 x 6 cm/4.25 x 2.36 inch Color: Silver, blue Strength: Approx. 25KN/2500KG Package Includes: 1 Piece Carabiner Note: 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