The DMM Sentinel is a multi-functional, super light mini HMS that has recently been updated to include a keylock nose. The beauty of this little locker is that it works really well as a small HMS and yet, because of it's slightly offset shape, also works as a great rigging/multi-purpose screwgate. Sentinel works equally well with any belay device, and fits snugly on most belay loops, reducing the chances of cross loading. It's deep basket and good gate opening make it a fantastic and versatile rigging biner too. The Sentinel utilises Hot Forged I-Beam technology to create a light, but incredibly strong carabiner. The barrel on the gate is machined from premium 7075 alloy to give it massive push-in strength. There is no current standard for this test, but at DMM they don't build carabiners to meet standards; they build their kit as well as they can, eliminate weaknesses and help push the standards forward. It is also anodised for protection against the elements especially coastal and rigorous mountain environments.