For anyone who uses a drill regularly, the drill bits are bound to become dull over time especially if they use it to drill hard materials. To most people, this means making a visit to the hardware to buy new bits. This trip will mostly interrupt a project because they do not realize it until the project is underway. Being able to sharpen your own bits will not eliminate this interruption but it will definitely save you time that could have been spent while visiting a hardware. It is therefore worth investing on a drill bit sharpener;