EXAMINE THIS REPORT ON TYPES OF SCREW HEADS

Yankee Screwdriver: Rather than applying ball bearings, this screwdriver makes use of a spring-loaded mechanism. In place of twisting the screw with your wrist, you place the screw head in opposition to the screw and thrust it to tighten.Protection screws (also referred to as clutch or a single-way screws) are built to be hard or difficult to unscr