Dog Leash, Swing, Rappelling, Hammocks, And Rescue Are All Made Possible With Product Details ?UIAA National Certification?These heavy duty climbing carabiner clips are made of aircraft grade aluminum 7075, are extremely sturdy strong. Every carabiner has obtained UIAA international certification. You can search our manufacturer's brand and product model to find the relevant certification on uiaa International official website.All carabiners have been strictly done their own internal break testing by industrial machines before leaving the warehouse. ?Auto Locking, One-hand Operation?Carabiners are designed to be strong enough to take huge falls over and over, without weakening, twisting, or getting damaged easily.With the twistlock design, very easy to use, you can easily operate this carabiners heavy duty with one hand. Turning the screw, you can lock this caribeaner easily, then turn it in the opposite direction and turn it on again to unlock it. ?Heavy Duty and Large Size? This carabiner measuring 4.3in x3in,large and heavy duty.This climbing carabiner is rated to 25kN from end to end while the gate is closed, 7kN cross force, and 8kN from end to end while the gate is open. These are pretty typical ratings for a carabiner this size.it's never advisable to carry the full weighted rating on any carabiner or rope (because you have to give some allowance for added force). ?Multi-Purpose Applications?Used for daily life, attached to the EDC/Camping/Hiking backpack,hammocks, camping, or use as a keyring. That means a 25kN carabiner could theoretically take up to 5,624lbs of force, or hold 5,624lbs of static weight. In theory, a carabiner could hold the weight of a car or a small, very calm rhino. The markings on carabiners are normally set out in the same way, with the major axis first marked by side-to-side arrows, the minor axis on up-to-down arrows. ?After-sales Guaranteed?- Our heavy duty carabiner are produced in accordance with strict procedures and high quality. If you are not satisfied with our products, we will provide worry-free exchanges and refunds. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.