The Wilderness Guide 4.0 Fixed Blade Knife (4.25" Black Plain) WSG-4. This knife is the result of long thought and substantial input from professional Outdoorsmen. With some 16 million backpackers just in the USA, plus all the Mountain Bikers, Trekkers, Sea Kayakers, Climbers, and Survivalists... TOPS realized that no one knife would do it for all. Therefore, the design is highly functional...using 1/8" thick, easy to re-sharpen 1095 High Carbon alloy. It has an exceptionally wide blade (1-1/2") with a blade length of 4.5".