This tool is required for cutting steer tubes. It works like a charm with only one minor problem. The slot for the saw blades is a hair too narrow for use with many of carbide saw blades required when cutting carbon steer tubes. This can be easily fixed taking the tool apart and adding a thin washer to widen the slot (downside is this may result in a slightly less straight cut when using narrower blades). Supposedly Park is in the process of redesigning this tool and hopefully they’ll address this issue in future models.