Peak Mountaineering
So there is lots to think about and the Serenity would never be my choice for climbing on rough gritstone or certain other high friction rock types. I also wouldn't bother choosing it when a short walk in means I don't need the pack ability or weight saving they offer. However, when faced with a heavy pack, a full on mountain day or a long walk in, the Serenity is worth every penny and the Serenity is currently my first choice for both personal and professional use on long multi-..." go to full review
DMM make several locking options but for standard climbing situations I would choose the screwgate variety every time. Screwgates are very user friendly and the physical process of screwing them closed gives time to check they are locked. They are also available in a variety of colours which makes them perfect for use in an instructional capacity (I give each client a small selection of Boas and coordinated slings with a different colour for each person so it is easy to track who is..." go to full review