Premium rack screws provide the best bit engagement in the industry. HG hardware features salt spray resistant plating that slows rust build-up and is ideal for marine and high-humidity installations. HM hardware features an attractive black matte finish. Truss-head hardware, 10-32 threaded, 3/4 " long with pre-installed washers and self-guiding pilot points. 500 piece in a reusable jar. Salt spray resistant, black gloss.