Zicral oval carabiner with its new innovative design and light weight is a very popular choice. Wide opening of 21mm. Its Keylock system renders passage of ropes and straps easier.
Triple locking action karabiner certified to EN362B. The simple oval karabiner is perhaps one of the most popular shapes amongst tree climbers. Being more symmetrical than the HMS shape (although still retaining a longer back for strength) there is an even distribution of the load, which helps with alignment of a climbing system.