The Fire Starter Buckle with Whistle is made for 3/4" straps and can be used for custom configurations like para-cord bracelets. One side of the buckle has a whistle and a concealed Ferro Rod for use as an emergency fire starter. The other side of the buckle had a striker for the Ferro Rod, which can be removed by sliding it out of the buckle. The buckle measures 2-7/16" long x 1" wide (1-1/4" wide at the whistle mouthpiece) x 3/8" thick. The Ferro Rod is 3/4" long x 5/32" in diameter. It weighs 0.4 oz. Again, it is for a 3/4" strap. Available in Black & Orange.