WALTHER Black Tac The Black Tac is a full-fledged one-hand knife with a liner lock and a flipper to assist in opening. The additional opening aid is a nose at the base of the blade. When the knife is closed it protrudes at the back of the knife and can be flipped with an index finger. When the knife is open, the flipper also serves as a one-sided parrying element, ensuring a secure grip. The massive spear-point blade, with a partial serration, is dull black, underlining the Black Tacs bold look. Additional useful features include a carry clip that can be mounted on either side, a glass breaker and an eyelet. Like all knives in the Tac line, the Black Tac comes with a Cordura holster and a safety strap.