I was in love with my new Taylor, and I wanted to have this wrench, just to compliment it. One end is a scewdriver for removing truss rod cover screws, the other end is the actual truss rod wrench. It's standard Taylor equipment, so if you have the nerve to adjust the truss rod on your guitar, this is the tool, and it's all you need. Of course there will be cheaper ones around but the name Taylor stands for good quality.