DIYers and mechanics, this 100-piece set of M3x12mm hex socket button head bolts is exactly what you need for all kinds of projects! These aren't your basic hardware store screws - they're made from high-grade alloy steel with a black oxide coating that makes them wear-resistant and corrosion-proof. The button head design sits flush against surfaces, while the hex socket drive gives you way more torque than Phillips or flat head screws. With a performance grade of 12.9, these are seriously strong bolts that can handle heavy-duty applications. Each bolt measures M3 x 12mm with a 0.5mm pitch, 2mm inner hex width, and head size of 5.5mm diameter by 1.5mm thickness. The 100-piece count means you'll have plenty for current projects and future repairs without running back to the store. Perfect for household hardware, electrical projects, mechanical equipment, machine tools, construction work, or any DIY project where you need reliable fastening. The black finish looks professional and the quality is immediately noticeable when you start using them. Whether you're building furniture, repairing equipment, or working on automotive projects, these bolts deliver professional results. The hex socket design means you can really crank them down without stripping the heads like cheaper screws tend to do. For the price, you're getting industrial-quality fasteners that will outlast and outperform anything you'd find at big box stores. This is one of those purchases that makes you wonder how you ever managed with lower quality hardware before!