To answer this question, we can compare a hex shank drill bit produced past and currently. The main difference is the technology of connection of drill bit and hex shank. In the past, drill bit factories use welding, press-in pin and press on hex shank to connect drill bit and hex shank. There are two disadvantages for all the connection technology. one is that the concentricity of the drill bit and hex shank is not on a straight line. That means the track of the drill bit top on working surface is ellipse when drill bit is turning. So this will short drill bit working life seriously. The other is it’s easy loose on the connection of drill bit and hex shank when the drill bit is put on big torque drill, especially on impact driver.

When a new technology (HIGHFIRE called “Solid Bonding Connection” ) is used on hex shank drill bit several years ago, the quality of hex shank drill bit is improved a lot. And the hex shank drill bit can be put on impact driver to drill holes easily and they have a long working life. People can use one tool to drill and screw on working special on DIY projects. The quick change of hex shank drill bit improve working efficiency. People can switch different tools on impact driver easily. A tool which can improve people’s working efficiency with less people’s energy can be a good tool.