Features: Kiridashi-style blade made of premium stainless steel. Small circular titanium handle with a black and gold finish. Titanium sheath/cover. Description: The atom is the building block of all matter. Protons and neutrons form the nuclei of atoms. But what are protons and neutrons made out of? Quarks! That's what! But what are Quarks made out of? Well that's simple, they're made of titanium with a tiny M390 blade, sharpened with a compound grind that can split all kinds of substances (but probably not atoms). WE Knife Co. makes a large variety of unique designs, each with excellent materials and workmanship.