Swix's Racing Sidewall Cutter is more adjustable than the economy version.
Friction-free roller guides and comes with one square and one round blade to remove excess sidewall material for better access to the metal edge when tuning.
Nice to use. Solid feel. All good
Easy to use and very effective tool -- a must for your tuning kit. Price seems a bit high, but the ease of using this reverse-able tool (square and round blades) might make the value worth the cost.