In addition to the simple snaps (mostly found on quickdraws) and the well-known pear-shaped HMS-carabiners, screwgate carabiners are also found in every climber's equipment. Below you can find some more information on the different variations of screwgate carabiners.
Closure mechanism of screwgate carabiners
Screwgate carabiners come with classic screw locks or combined closures, such as a rotatable screw lock. No matter how sophisticated such mechanisms might be, they may also be very impractical to handle. That’s why we recommend beginners to opt for simple screwgate carabiners. Ice climbers should also check whether the carabiner can be opened with gloves on or in a slightly frozen condition. With a little practice, you’ll soon be able to use screwgate carabiners with a rotatable screw lock with more speed and ease.
Shape and design of screwgate carabiners
Some screwgate carabiners resemble small HMS carabiners in their shape. Due to their special curvature, they offer great protection against transverse loading caused by twists. Moreover, some models also have a wire to protect against any accidental twisting. If you like climbing long routes or routes with traverses, you can also use screwgate carabiners with an integrated rope pulley in order to reduce friction.