OTF knives are great for situations that require a blade that deploys out the front. They also take up less space than a knife that opens sideways. The blade material and shape are two important factors to consider when choosing the best double action otf knives. Moreover, the design of the handle is another important consideration. ProTech The ProTech Infidel knife is one of the most popular double-action otf knives available. It can be easily used with just one handed.…