Petzl Fil Flex Toe Bails Wide. It allows you to use Petzl crampons with mountaineering boots that don't have toe welts. Sold in pairs to equip a pair of crampons. Specifications for Petzl Fil Flex Toe Bails: Manufacturer: Petzl Fabric/Material: Stainless Steel Nylon Features of Petzl Fil Flex Toe Bails Compatible with LEOPARD LLF LEOPARD FL IRVIS HYBRID IRVIS VASAK SARKEN LYNX and DART crampons with the BACK LEVER or BACK FLEX heel bails Package Contents: Petzl Fil Flex Toe Bails Petzl U013AA00: Fil Flex Toe Bails Wide