Home improvement can be an exhausting chore, so to make things easier Chun Chen Screw of Taiwan has invented a screw that can penetrate even the hardest wood with little effort.
The company says pre-drilling holes for screws rarely works effectively because screws don’t bite well enough into the wood, leaving a weak join. But without pre-drilling, you’re likely to destroy the head of the screw before you get very far. The company’s invention is a screw with two different threads. The tip of the screw bears a spiral of triangular cutters shaped like miniature arrowheads (GB 2371343). As the screw is turned, these cut a spiral track in the wood into which the normal circular thread further up the screw can easily follow.