Choose a Specialty radius if you are particular about your radius. If you don't know what radius your skate blades are then the Standard 1/2" ROH is your best bet.
This is the handiest tool ever for hockey players and skaters of any type. It fits into your pocket so easily you dont even know it's there. The surprising thing is that you get a top quality sharpening tool that's as good as any drop it off sharpening shop - really. Get two as everyone will want to use yours and eventually you will " lose" yours. Coaches throw 3 or 4 of them into the team hockey bag for a fast tune up. Highly Recommended.
The Blade Barber is fantastic! It does a perfect job on my blades - better than most shops and rinks you go to where the 'kid' is working. The instructional video is well worth the watch!
I recently purchased the Blade Barber and couldn't be happier. Its small enough to fit in your pocket, easy to use and super convenient. Would highly recommend.