Everbilt's metric socket set Screw is headless Screw that is fully threaded with a recessed internal socket drive to add strength. Used for fastening in confined areas where the head must be below or flush with the surface, they can be fastened with an Allen key. The flat point design is intended for resetting or relocating often in a semi-permanent application. Made of heat-treated alloy steel for use in machinery, automotive, and position able components. Socket drive prevents slippage when installing.