The Microtech A.D.O. (Alpha Detachment Operative) is hand-crafted from a solid billet of 154CM steel. The blade is a hollow ground with a plain edge. This knife follows the design philosophy of Chris Reeve fixed blades with a hollow handle, accessed by unscrewing the glass breaker tip (with o-ring seal). The A.D.O. comes with a hand molded kydex sheath.