The 3D Rocking Bar Descender is a lightweight, compact, safe, and easy-to-use device compared to a standard 6-bar rack. Optimal friction control is achieved with two sliding bars. The angled (black) bar works well with half-inch, 13mm diameter static ropes, making it easy to secure and release the rope. Usable from 9.5mm. A large carabiner for rescue can be attached to the carabiner connection, and because it is larger than a Scarab, the ropes will not touch or rub against each other. The rope passes straight through the 3D, so kinking does not occur even when descending long distances or lowering. To unlock the center bar, pinch the center bar with your thumb and index finger, press the red button with your thumb, and rotate. The rope can be locked, so the rope will not accidentally come off the device even when there is no tension. Specifications 3σMBS: 13.5KN NFPA T Use : 22kN NFPA G Use Weight: 485g Dimensions: 175 x 106 x 32 (mm) Material: Stainless steel / Aircraft grade aluminum Regarding the price, we do not answer inquiries in the comment section asking "How much can you lower the price?". We used to reply, but many people don't respond even after we lower the price, so please use the Mercari price reduction request function and enter your desired price (target price). If we lower the price to your desired price, we may revert it if you do not purchase it within 12 hours.