DMM Ultra-D Screwgate CWS Locking This gives the Alpha Sport

This gives the Alpha Sport Bent increased rope bearing radii

Other notable feature is it's durability:

thanks to the wide and rounded rope channel

Great for use in geo-technical work where dirt can clog up some other devices and as a rope access back-up device for those working off-shore

DMM Ultra-D Screwgate CWS Locking This gives the Alpha SportThe Ultra D is similar in size and weight to the Ultra O; however it is stronger and has a slightly bigger gate opening. The open D shape gives a lot of internal space within the biner, which makes it useful for setting up belays. Its also finding favour as a perfect partner to a belay device. Features D shaped locking biner Strong and lightweight I Beam construction Shrouded nose Generous rope radius Can be supplied with a captive pin to hold the