A bit may need attention when holes become rough, incomplete, scorched, or difficult to produce. Increased noise, heat, pressure, and repeated clogging can also indicate wear. Sharpening may restore a suitable bit when enough material remains and the correct sharpening tool is used. Replace bits that are chipped, bent, cracked, excessively shortened, or unable to hold an edge. Keep a spare compatible bit available when the drill supports regular production. Continuing with a damaged tool can affect hole quality, increase heat, and place unnecessary strain on the machine.