Outdoor Whistle Knife is a lightweight fixed blade survival tool with built-in whistle. Sharp 7.8 cm steel blade (≤60° edge), full length 17.5 cm, handle 9.7 cm. Blade thickness 3 mm, weight only 56 g. Includes black sheath with lanyard. Ideal for camping, hiking, emergency signaling, and outdoor use. Compact and multi-functional.