The Wera 05135403001 TORX Bit is a top-quality tool designed to work with recessed TORX® screws. This bit features a compact size of TX 4, making it an ideal option for tight and hard-to-reach spaces. The 40mm overall length provides enough reach to access deep-set screws with ease. With a 1.8 mm shaft diameter, this bit is precisely crafted to fit securely into the screw head and eliminate the risk of slipping or stripping during use. The bit's hard design adds to its durability, ensuring long-lasting performance even under heavy-duty use. The 4 mm HIOS drive (Wera connecting series 21) enhances the bit's efficiency and enables fast and easy fastening. Whether you are a professional or a DIY enthusiast, the Wera 05135403001 TORX Bit is a reliable tool that offers precise and consistent performance with exceptional durability.