Fixing screw: Coarse-toothed CUP POINT SS socket head flat head screw, with flat and smooth head, deep thread, uniform force, good tightening effect, and not easy to slip during rotation. | High-quality material: The fixing screw and wrench are made of high-quality 304 stainless steel, which combines nickel-chromium, acid resistance, high hardness, no rust in humid environment, and strong oxidation resistance. Built to last. The material is environmentally friendly and pollution-free. | Scope of application: Widely used in mechanical equipment, civil hardware and compact instruments, such as gear fixing, cam fixing, household door handles, hardware faucets, towel racks, etc. | Function: It is usually used to fix the object without using a nut, and it can be installed concealed. | The package contains: Fixing screw x 25 + Hex key x 1. Multipurpose hexagon socket head set screw, you can easily drive with a hexagon wrench, easy to operate.