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Brownells MAGNA-TIP screwdriver allows gunsmiths and firearms enthusiasts to have a precise fit for almost any gun screw they may encounter. The screwdriver features a TRUE hollow-ground bit that evenly transmits energy and torque up the bit's shank. This grinding method also provides complete metal-to-metal contact between the bit tip and the screw slot, allowing for maximum power transfer, similar to that of a finely tapered gun spring. If the screwdriver's bit is dubbed off square, torque pressure concentrates at the square edge of the grind, which can lead to breakage. In contrast, standard, straight-tapered screwdrivers deliver all torque pressures to the fine edge of the screw slot. The Brownells MAGNA-TIP screwdriver set includes eleven bits for slotted screws, #1, #2, and #3 Phillips bits, and ten hex bits for socket head screws. Additionally, it is possible to buy extra bits and grind them to an exact fit using the special Shaping Stone. The bits used in the Brownells MAGNA-TIP screwdriver are designed for heavy industry, manufactured for high-speed, production, impact-power drivers used to set screws in mass production applications, and made with the right combination of hardness and durability for maximum strength and wear.