Bosch TORX Security Insert Bit T10H 38342B10 The Bosch 38342B10 is an extra-hard T10H security TORX? insert bit engineered for professional use in high-torque applications involving tamper-resistant fasteners. The core of this bit's performance lies in its construction from extra-hard, tempered steel, which undergoes a proprietary hardening process. This results in a tool that resists fracture and wear even when subjected to the repeated stress of power drivers, ensuring a long service life and reducing the frequency of bit replacement on the job. A key feature is the precision-forged tip, which is designed for an exact fit with T10H security screws. This precise engagement is critical for preventing cam-out and stripping of the fastener head, a common issue that can render a security screw nearly impossible to remove. The "H" designation signifies the hollow point, which accommodates the security pin found in tamper-resistant TORX? screws, making it essential for assembling or servicing secure equipment. With a universal 1/4-inch hex shank, this bit is fully compatible with standard magnetic bit holders, drills, and modern impact drivers, offering maximum versatility across a range of tools. This 10-pack is an economical choice for professionals and workshops that frequently work with T10H security fasteners, ensuring that a durable, reliable bit is always on hand.