LEXIVON's Tamper Proof Torx Bit Set, Premium S2 Alloy Steel | 13-Piece Security Star Bits, T4 - T40 | Precision CNC Machined. Tired of your bits wearing down and stripping screws? When it comes to torx bits, you want something that is both durable and comfortable. With this LEXIVON Tamper Proof Torx Bit Set, you get just that. The industrial grade Heat-treated S2 alloy steel, known for its supreme hardness, reduces wear-outs, while the precision CNC-Machined manufacturing process ensures a smooth fit and protection for both your bit ends as well as your fasteners. Sizes Included in this Security Bit Set: 1/4-inch shank - T-4, T-5, T-6, T-7, T-8, T-9, T-10, T-15, T-20, T-25, T-27, T-30 and T-40. (Note: T-4 is NOT Security Tamper Proof Type) With LEXIVON Flexible Drill Bit Extension, ideal for reaching challenging areas. This tool is a valuable asset for both professional and DIY projects. Extend your drill's reach with our 12-inch extension. Its 180-degree flexibility allows precise drilling in tight spaces like behind appliances and inside cabinets, ensuring no corner is left untouched. Constructed from premium steel, our drill bit holder supports up to an unprecedented 3600 RPM, providing durable and fast drilling performance for the toughest tasks. Our drill extension features a spring-activated bit holder with a knurled grip for secure usage. The integrated quick-release system allows for easy bit changes with a simple push-down action, enhancing efficiency and streamlining your workflow. Fits all standard power and impact drills, increasing the versatility of your equipment. Our drill bit holder comes with a bonus high-strength steel bit, ready for immediate use on a wide range of tasks. Perfect for precise, efficient work, it is the tool you need for better performance and results.