For the mechanics and machinists out there, these uxcell taper pins are serious quality hardware! Made from 45# carbon steel, they're high-strength and built to handle demanding applications without failing. Each pin measures 50mm in total length with a 21mm threaded section and M6 thread diameter, making them perfect for various mechanical and industrial uses. The taper design is smart - it holds parts together securely when installing fasteners, and the threaded stem releases easily without galling or sticking. You get four pieces in the pack, which is perfect for most projects or having spares on hand. The black and silver tone finish looks professional, and at 42 grams total weight, they've got that solid, quality feel. Whether you're working on machinery, equipment repair, or precision assembly work, these taper pins provide reliable performance that cheaper alternatives just can't match. The threads are clean and precise, so they engage smoothly without cross-threading issues. If you need dependable fasteners that won't let you down under pressure, these are absolutely worth having in your workshop. Just well-made, professional-grade hardware that does exactly what it's supposed to do without any surprises or failures mid-project.