UST - Ultimate Survival Technologies, MagBar Fire Starter, Magnesium Fire Starter, Gray WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Reliably starts hundreds of fires Shaver/striker included Includes striker attached on key chain Size LxWxD: 3.1 in x 1.1 in x 0.4 in (79 mm x 29 mm x 10 mm) Weight: 1.8 oz (50 g) Product Description Tried and true, the magbar fire starter combines magnesium shavings and the sparks of a flint to start the fire you desperately need. Use the serrated edge to shave off magnesium into a pile. Use the other edge to strike the flint bar and create sparks.