Black Diamond Long Flex Center Bar
Black Diamond's Long Flex Center Bars allow you to adjust your crampons to fit oversized boots. Extra-large spring-steel center bar is compatible with all crampons. Sold in pairs.
This is the best all around, general mountaineering crampon. I've worn these all over the world. These are great for climbers of every level, a simple binding system that works with a wide range of boots and moderately aggressive front point, perfect for glacier walking.
Leather Boots: Typically, if your boot is larger than a size US 12, you'll need a long bar.
Plastic Boots: Typically, if your boot is larger than a size US 10, you'll need a long bar.
Long Flex Center Bar