230 x Flat/Hex Washer Head Concrete Masonry Screw Tapcon Anchor & Bit 1/4″ 3/16″
Concrete Screws is made of top-notch hardness carbon steel,highly malleable and weldable.Upgraded drilled hex head concreete screws are more abrasion and corrosion resistant than ordinary screws.The surface of masonry screws for brick is treated by blue rust,which is more wear-resistant,corrosion-resistant and oxidation-resistant than ordinary screws.