Calling all DIYers and pros! This Aexit 21mm hand tap is your go-to for creating perfect metric threads. Made from durable HSS (high-speed steel), this silver-gray tool features straight 4-flute design that efficiently clears chips while you work. The specs are spot-on: 21mm cutting diameter, 24mm thread length, and 13x13mm square head that fits standard tap handles. At 88mm total length and 126g weight, it feels substantial in your hand without being cumbersome. The straight flutes are precision-ground to make chip removal smooth and prevent clogging - super important for clean threads every time. Whether you're working on automotive projects, machinery repairs, or custom fabrication, this tap handles both hand and machine applications beautifully. The quality construction means it'll last through multiple projects without losing its edge. Just remember it's sold individually, so you might want to grab a matching handle if you don't already have one. Solid performance at a great price point for home workshops or professional use.