I have used a dozen or so tools over the years to break and then install chains and every one of them was problematic in some way. After being ignorant for so long, I decided to walk a slightly more appropriate path and I bought the PBR. Wow! This tool makes changing drive chains so easy that you could instruct a six-year-old on the finer points and leave him/her to it! The only issue is the rough handle; if you have been using your hands all day doing maintenance, it can abrade the palms easily. Just wear work or nitrile gloves and you will be fine. I HIGHLY recommend this tool to anyone who rides chain-driven bikes or needs to maintain chains of a similar size and design.