Check the listing for details. 6" Black Ninja Skull Tactical Titanium Throwing Knife 3pc Sheathed Set. Condition: New. Listed at 16.98 USD. This is the 6" Ninja Skull Punisher Tactical Throwing Knife 3pc Set w/Sheath. They are sharp, light and flat knives that are easy to carry anywhere you go. This set of throwing knives have high-quality durable stainless steel blades that can serve you in any condition. The skullhead throwing knife set has a distinctive popular design choice that makes for a great gift for both young and old. These knives come in three different sets. The Rainbow set which comes with a color mix of gold, rainbow, and blue knives. The Black set which has all 3 blades painted in all black.