Self-belay set as well as a system with belay points

A self-belay set comprising a first carabiner and a second carabiner which are each mountable at belay points, wherein each of the first carabiner and the second carabiner is blockable by means of a respective blocking apparatus and wherein each of the first and the second carabiner is attached to a connection piece attachable to a self-belaying user, and further comprising a coupling means for interconnecting the blocking apparatuses of the first and second carabiners;

• a locking means for the first and second carabiners which upon mounting the first carabiner in the belay point and upon actuating the locking means will block the first carabiner from opening via the associated blocking apparatus;
• the blocking apparatus of the second carabiner being actuated via the coupling means to release the second carabiner for opening, so that at all times only one of the first carabiner or the second carabiner is openable, and
• wherein the locking means is a key fastened to the belay point;
• wherein the key is provided separately from the first carabiner and the second carabiner.