One Dozen Havel's Blunt Tip #22XT Fits All Piranta / Tracer Knives. Reduce accidental punctures and poke-throughs with our new Havel's Blunt Tip #22XT Blades. It's thicker than the standard #22 so the blade holds its edge longer and resists breakage. For professionals, our new Blunt Tip #22XT is safer for your work, and safer for your hide, too. Try a dozen today!