The Jul 2 Belay Kit consists of Edelrid's secure locking carabiner and self-braking belay device designed for single climbing ropes. Ideal for beginners at a gym and advanced sport craggers alike, the Jule 2 is an assisted braking device that automatically pinches the rope against itself for a high braking performance. When engaged, the thumb catch can release that braking tension so you can feed out slack with ease. As for the HMS Strike Triple FG Locking Carabiner, it automatically locks closed for extra security, and you can unlock the gate with a simple slide, twist, and pull. It has a stainless steel plate to add abrasion-resistance where the rope rubs against it, and the spring bar orients the carabiner properly on your harness, so you don't have to worry about cross-loading.