Genuine Thunderbolts They are the original and the best self tapping all purpose anchor. Thunderbolt is the original self-tapping anchor fixing with the power to be used with a range of Building materials, including... Concrete Stone Brick Marble Wood Block The Thunderbolt® anchor and self tapping allows for safe anchorage, where the substrate becomes the nut for the bolt The Thunderbolt can be installed closer to edges and closer together at varying depths, which provides a stress free fixing.  Installation is quick and easy.  It is the ideal general purpose anchor which can even be used on temporary jobs as it’s completely removable unlike traditional anchor fixings which can be hard to remove.  Thunderbolts use standard sized drill bits. They are very cost effective to fix any job.   Thunderbolts are used by general builders, property developers, fencing contractors, shop fitters, plumbers and roofers for a variety of jobs including, supporting fence posts, attaching handrails to walls, affixing satellite dishes and joining timber battens to brick work. How it works Drill a hole the same size as the Thunderbolt into the material. (Ensure the hole is a little deeper than the bolt to allow for dust) Remove any loose dust from the hole. (A blow pump is perfect for this, you can visit our shop to buy one) Screw in the Thunderbolt with a socket wrench. Apply a slight downward pressure to start the self-tapping action, as you would with a wood screw Tighten the Thunderbolt to secure the fixture in place We are a small family run UK based VAT registered company and an eBay for business 2018 Award winning company recognised for our exceptional service and comment to our customers so when buying from NUTS 'N' BOLTS you can guarantee high quality products and service  Our thunder bolt range is dispatched via Royal Mail 24 or on larger orders a 24hour courier service Order before 3pm are usually dispatched the same working day