The toothless, key-lock design of this snap hook results in much less snagging on lines and webbing. This is especially important when attempting to disengage lines - the decrease in catching and snagging is significant. Unlike the hook-style carabiners, the gate opening on these carabiners is smooth and polished, with no sharp edges to cut or catch. Once you try these toothless carabiners, you will never go back.