Tool Logic SLPB3 Tactical Folding 1/2 Serrated Knife With LED Flashlight, Diamond Sharpener and Signal Whistle, Black Three-inch 50/50 serrated stainless steel with satin blade bead blast finish Brilliant white LED flashlight and diamond sharpener Loud emergency signal whistle Flashlight is waterproof for shallow immersion and is ideal for work in low light situations Rugged frame lock and pocket/belt clip