I have several tools to make nut slot cutting easier and/or more accurate. They all work but this is the fastest for me. I can't always fit the tool into the high E slot (only on some electrics with light strings, acoustics I have tried have no issue with this). Regardless, even if it doesn't fit one string slot on certain guitars, it's still easier and faster than other tools I have. I had to reach out for help to address failing adhesive holding it together; they were quick and courteous and got me up and running. They even gave me a discount for my time spent reassembling it. All good!