The Rat Worx MRX series of knives represents several firsts in the knife making industry. It features a fully automatic blade that operates on an innovative mini roller chain system. Simply press the firing button and a chain pulls the blade smoothly into the open position with snappy automatic action. The blade is powered by dual nested right and left hand extension springs and pivots on a permanently lubricated ball bearing system. It has a machine hollow ground blade made from CPM-154 steel in a stonewash/satin two-tone finish. The lanyard cut handle is made from aluminum with a black hard coat anodized finish and it comes equipped with a tip-up carry pocket clip. The MRX line of knives represent the next generation of fail-safe automatics and are the only knives with a chain link auto mechanism and a permanently lubricated ball bearing pivot.