Like the SpiderJack 2.1 but with the Dyneema kit installed. The Dyneema sling is attached to the body of the device and the ring is connected to the carabiner of the device. On the top end of the sling you can attach a carabiner for connection to your spliced climbing rope. The Dyneema version allows you to change the climbing system much easily than before.??It is very important to check that the ring is connected to the karabiner before climbing.