These are the "beefiest" tour frame binding that Fischer makes. I have these on my Ranger 108s and really enjoy the feel of an alpine binding that has the flexibility to take me into the backcountry. For skiing in the New England this comes in very handy as on a poor snow year I can still lap the resorts in my alpine boots or I can bring tour boots and get a few uphill laps in. Whatever you decide, a frame tour binding will let you expand your terrain. These bindings offer a DIN of 4 - 13.