The NEW BC Magnum features an extra-wide(67 mm.) plate to increase the contact area with the boot sole.
The Magnum (Manual) also has a large �glove-friendly� manual closing lever. #32NBX
The Manual Binding , with a slighty narrower body, is an ideal choice for narrower backcountry skis. Both bindings fit all NNN BC boots.
Less apt to freeze up than 32NBCA BC Auto bindings.