This Protech TR-3 Tactical Response Knife Blue Jazz Grooves Black Plain Edge. Jazz Tactical Response 3 has a DLC black finished 154-CM stainless steel blade with a plain cutting edge. The blue jazz anodized aluminum handle has grooves milled on the front face, while the back face is smooth with a tip-up carry pocket clip. The TR-3 is a knife that won't let you down. It fires hard, locks up like a rock and feels great in hand. The slim design sits comfortably for pocket carry.