Take everything you expect from a traditional lockback folder. Then pile on the features: can opener, bottle opener, bit driver (with six screw bit tips), even a carabiner clip - but do it so the extra versatility isn&#x27;t noticed until it&#x27;s needed. What you get is a product engineers like to call &quot;feature dense,&quot; which means the k502x and k503x provide maximum usefulness with minimum bulk.