We are going high-tech with space age materials. This heavy duty survival knife features a 2.5 mm thick 12C27 Sandvik blade, a thick serrated area, an integrated 4 seasons 110 DB survival whistle, and a shackle key. The handle features a non-slip area (colored area) and can resist extreme temperatures (-40c to 80c).Blade Length 3.25 inchesSteel |Stainless Steel |StainlessOverall Length 7.5 inchesWeight 1.5 oz