High-grade plastic expansion dowels engineered for reliable anchoring and light-to-medium duty fastening into masonry, concrete, solid brick, and plastered walls. Molded from impact-resistant, high-density polyethylene/polypropylene with multi-directional expansion ribs and anti-rotation side fins to prevent spinning inside drilled holes during screw insertion. Features a ribbed split-shank profile that expands firmly against masonry substrates, ensuring maximum grip, pull-out resistance, and secure fixing for wall profiles, frames, and fixtures.