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.
I have been using the 1/2" ROH for about a month now. It works great. Its really hard to get skates sharpened in Wellington New Zealand. We have to ship our blades to Auckland. Now I can do them anytime. The only problem is that my mates keep wanting to use it. I suspect Blade Barber will have quite a following from down here! Keep up the great work.
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 highly recommend the Blade Barber sharpening tool. I got the chance to use mine last weekend and it really works! High quality shopping from a tool small enough to put on my key chain. Service is top notch, Blade Barber accidentally sent me the wrong hollow on one of my items and quickly shipped out a replacement at no cost to me. I am living overseas in Japan at the moment and this tool is very useful to me as sharpening services are very difficult to get to. Tim and Peter are great guys and if you have the need for a tool like this I say don't hesitate and just buy it. For this price and quality it can't be beat!