The surface of marshes, swamps and bogs is initially porous vegetation that rots to form a crust that prevents oxygen reaching the organic material trapped below. That is the condition that allows anaerobic digestion and fermentation of any plant or animal material which incidentally also produces methane. Featuring a stonewash finish Drop Point blade, the Swamp Gas Spring Assist Emergency Knife offers a smooth opening with its spring assist mechanism and locks up solid with a liner locking system. Just assist the blade with the thumb stud about 30 degree and watch the spring do the rest. The most sought after feature in this auto-assist knife is the glass breaker for emergency get-a-way and the belt or rope cutter. The blade is 440 stainless steel and sharp. The G-10 handle has been textured with and colored to create an optical illusion of motion or gasses which gives this piece a unique look and style. A belt clip allows you to secure this knife in your pocket or on your person at all times.