When Duty Calls. Named after the Kline arrowhead found in the Delaware River Valley of Pennsylvania, the Kline is our newest American-made folder and packs a lot of punch into a larger, rugged form factor. The Kline represents our first use of MagnaCut, a new EDC-specific stainless steel designed to be ultra corrosion resistant and extremely durable. This is a true USA-made super-steel, and we are excited to introduce it into the TJB line. The Kline also has a removable/reversible deep-carry clip, a the TJB Slide-Lock locking mechanism, and a full-liner construction. With its larger size, Micarta scales and ambidextrous design, the Kline has everything you need in a larger workhorse folder.