Brownells #445-00 Magna-Tip Parallel Tip/Hollow Ground Bit

The TRUE hollow-ground bit ensures that all torque is transmitted evenly and smoothly along the shank of the bit. This design not only facilitates efficient power transfer but also ensures complete metal-to-metal contact between the bit tip and the entire screw slot. Consequently, maximum power can be applied, similar to the action of a finely tapered gun spring. In contrast, so-called "hollow-ground" screwdrivers that have been ground off square cause torque pressures to concentrate at the square edge of the grind along the tip. As every gunsmith knows, such a flaw in a spring can lead to breakage. Standard, straight-tapered screwdrivers focus all torque pressures on the fine edge of the screw slot. Additionally, due to their tapered design, the laws of simple physics cause the bit to be forced out of the slot. The bits used in Brownells Magna-Tip screwdrivers are specifically manufactured for heavy industry applications. These components are integral to high-speed, production-grade impact drivers, optimized for precision screw setting in large-scale manufacturing environments They must be engineered with an optimal blend of hardness and durability to ensure maximum structural integrity and resistance to wear