DMM Steel Boa HMS - Screwgate Locking Carabiner The DMM 12mm Boa HMS has all the versatility of its alloy sibling, but has a rated strength of 40kN. It can be used for many applications where a large gate opening or high internal volume are required. The smooth rounded internal form is very useful when rotating the carabiner through attachment eyes, and the basket curves nicely to allow central hanging of loaded components. HMS for space and rigging HMS connectors are pear shaped and often have similar characteristics to ovals in how they deal with loaded components, i.e. they also allow devices and connectors to self-centre. Moreover, the extended basket allows for additional component connection. Knots in a system such as an Italian hitch can rotate easily between taking in and paying out (even with larger diameter ropes). In general, HMS connectors are slightly oversized to accommodate the added volume of bigger ropes and to feel secure in a gloved hand. Cold forged Features: HMS locking karabiner Taperlock nose Large gate opening Durable Cold forged Ideal for rigging or belaying; can accommodate multiple knots Easy to handle in gloves Strong I-Beam construction to save weight (almost 25% reduction) Screwgate (Scrow-lock) locking systems: Classic manual system, versatile and universal The sleeve locks manually, only when desired by the user Can be operated with one hand Reliability in dirty or harsh environments Red visual indicator, when unlocked, to facilitate monitoring The user actively operates the sleeve when locking, so he is immediately alerted in case of bad locking Watch this short video to find out more about the features and benefits of the Boa carabiner. Technical Specification: Screwgate locking systems Code - C852 Major Axis - 40kN Minor Axis - 10kN Gate Open - 12kN Size - 76 x 123mm  /  2.99 x 4.84in Weight - 262g  /  9.2oz Gate Opening - 24mm Conformance - EN 362:2004 B, EN EN12275:2013 B & H