Karl Elsener, a Swiss designer of surgical equipment in the 19th century, worked for years on perfecting a military knife. Today his Swiss Army Knife is associated with excellence in blades and a variety of utilities. One model includes knife blades, a saw, scissors, a magnifying glass, a can opener, a screwdriver, a ruler, a toothpick, a writing pen, and more—all in one knife! If you are out camping in the wild, this one item can certainly make you feel equipped for survival.