The simplest and most convenient way of identifying components within any system - the DMM Ultra O Multipack includes all three carabiners for the one price. Ideal for the training market - now trainers can identify systems from a distance. And the multipack is an economical way to purchase Ultra O carabiners. The DMM Ultra O is designed to work perfectly with the DMM Hitch Climber. Hot forged in Wales with I-Beam panels resulting in a major axis strength of 25 kN and a minor axis strength of 12 kN. The Ultra O also makes a good belay carabiner with a really wide, 9.75 mm rope radius that is kind on your ropes. Plus it has a high cross loading strength. A convenient way to organise work teams and individuals.