For all you DIYers and mechanics out there, this HSS 1/4-18 NPT thread forming tap is seriously handy to have in your toolbox! Made from high speed steel, this thing is built to last through tough materials without losing its edge. The 1/4-18 specification means it's perfect for creating pipe threads, and at about 6cm long (2.4 inches) with 2cm of useful threading length, it's just the right size for most jobs. The shank diameter is about 1cm, so it fits standard tap handles perfectly. What's great about thread forming taps versus cutting taps is they don't produce chips - they actually displace the material to form the threads, which often results in stronger threads. This tap works on all kinds of tough metals like stainless steel, iron, cast iron, alloy steel, carbon steel, and other difficult-to-machine materials. It comes in its own storage box too, which is super convenient for keeping it protected and easy to find. Whether you're repairing plumbing threads, working on automotive parts, or doing general metalworking, having the right tap can save you from a major headache. The quality is solid, and if you have any issues, the company actually stands behind their products with a satisfaction guarantee.