They are very tough plastic with no metal edge to blow out. Stiff, fat, rockered, scaled, short. They have integrated inserts and you just bolt of your run-of-the-mill viole 3 pin, cable option if ya want but I never use it. Plastic tele boot. They climb well for scaled skis, and you can as herring bone really easy becase they are so short. Some folks put skins on them but I don't need 'em just climb slightly lower angle. The real suprise with these things is how well they ski. Not sure about radius, but they want to smear everything and carve long turns on hardpack. Laugh-out-loud fun. I think they go for 200 bucks, bindings 30 bucks, any old tele-boot laying around....Merry Christmas!
$189.00
http://marquette-backcountry.com/fre...ked-questions/
http://www.youtube.com/watch?v=vbyTX4EvvNA