【High quality materials】Crafted from corrosion-resistant 304 stainless steel,these screw withstand harsh environments,rust,and wear,ensuring long-lasting durability for indoor and outdoor projects 【Shape feature】Features a sleek black oxide finish for enhanced aesthetics and added protection against oxidation.The flat head sits flush with surfaces,ideal for streamlined furniture assembly and discreet fastening 【Specific size】Thread diameter:1/4";20 threads per inch;1/2" length;Allen Hex Drive,Please check specfication by picture 2 【Full thread design】Fully threaded 1/2" length (1/4-20 thread size) provides superior grip and adjustability,making them perfect for heavy-duty furniture,cabinetry,machinery,and DIY applications 【Quantity and usage scenarios】Includes 50 bolt and a compatible hex key for immediate use.Versatile for woodworking,metalworking,or home repairs,offering exceptional value and reliability metuja