Folding knives make great knives because when they are not in use, you can fold them up and put them into your pocket. Folding knives are safer than traditional knives because once folded you can not cut yourself on the blade. Blades on folding knives are typically no larger than 3 to 5 inches in length and can be used for anything. These knives are generally cheaper than other knifes and are the most commonly carried by the average consumer.