Closeouts. Simond Spider HMS auto lock carabiner has the Smooth Monoblock system to eliminate snagging and add tensile strength. Spring-activated rope keeper discourages excessive movement or accidental slippage.
Reviewed by Wendy from Cambridge, MA on Saturday, June 29, 2013
It is very easy to open as advertised, and is self-locking, so I don't have to worry about forgetting to screw it tight, like with other carabiner types. However, I almost feel like it's a little too easy to open...but so far I haven't had any problems. I just hope that the mechanism will last through many uses.