The Faithfull Self Tapping Lightning Bolts are a range of masonry fixings that tap their own thread, providing a medium-duty fixing into concrete and most types of masonry. Safe anchoring is achieved without the need of high tightening forces. These virtually stress free fixings allow use in close to the edge applications. Manufactured from high grade steel and zinc yellow passivated for durability. They may also be used in wood, marble and stone.