Boker USA Camp & Hike Hunting Mono Knife Brown Small 110615. However we listened to the many inquiries we received regarding a new version – and so this particularly sturdy knife is once again complementing our Trio and Quadro series. Focusing on the most important feature which is the potent 3.5 mm blade the Mono is the perfect knife for the huntsman who doesn’t care for additional tools. The blade is secured via the usual backlock. The nickel silver bolsters and stag scales pay homage to tradition. The blade is made from powder metallurgical CPM CruWear with great edge retention. With its outstanding performance profile and a Rockwell hardness of 62-63 HRC this steel has already set the standard for the Trio CPM and Quadro CPM.