Is the flint missing from the SIGNAL? As a spare part you can order here the original flint / emergency whistle tool from Leatherman. If you have lost the flint in nature, you can find the right replacement here. In case of heavy use each flint is used up once and should be replaced as well. Because in an emergency all tools should work. The entire design is determined by efficiency in signal yellow the plastic is easily recognizable and effectively encloses the flint. With the emergency whistle you can draw attention to yourself in an emergency. The outdoor multitool Leatherman Signal is an allround talent that includes all the tools you really need in nature. Hikers, survival experts and extreme athletes will love this tool and will always want to have it with them as part of their equipment.