Brownells #445-10 Magna-Tip Parallel Tip/Hollow Ground Bit

The Brownells Magna-Tip screwdriver features a true hollow-ground bit that ensures even and smooth transmission of torque along the shank. 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, allowing for maximum power application similar to a finely tapered gun spring. In contrast, so-called hollow-ground screwdrivers with squared-off edges concentrate torque pressure at the square edge of the g