Hex-Shank Drill Bits

A hex-shank drill bit has a six-sided shank that locks into hex chucks and quick-change adapters to resist slipping and allow faster bit changes; round-shank bits are cylindrical and require a keyed or keyless chuck for secure holding

High-speed steel (HSS) or cobalt HSS is suitable for most metals, black-oxide or titanium-coated HSS for general-purpose metal and wood, and carbide-tipped or masonry-specific hex-shank bits are best for concrete, brick, and stone

Pick individual diameters you use most or buy a set that covers a logical range for your work (e.g., 1/16"–1/2" for general drilling); consider metric vs. fractional sizes and whether you need short, standard, or extended lengths for reach

Yes, many hex-shank bits are designed for use in impact drivers and drills; look for bits labeled as impact-rated or made from tougher alloys (e.g., S2 or high-cobalt) to withstand the higher torque and shock of impact tools

Keep bits clean and dry, remove debris after use, store in a protective case or organizer to prevent contact damage, and resharpen HSS bits when dull or replace carbide-tipped bits if chipped

Budget sets often use standard HSS with basic coatings and may wear faster under heavy use, while higher-quality sets use tougher alloys, better heat-treated steel, and advanced coatings or carbide tips that retain edges longer under demanding conditions

HSS hex-shank bits can be resharpened with a bench grinder or sharpening tool when they become dull; carbide-tipped bits that are chipped or damaged are usually more practical to replace than repair