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A useful drill bit set is not the one with the most pieces. It is the one that covers the materials and hole sizes you actually encounter, fits your drill, and includes bits sturdy enough to survive more than a few holes. For typical home repairs, that means wood, metal, and occasional masonry—not a huge assortment of specialty cutters.
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What to buy for common repairs
For a first set, look for roughly 20 to 30 bits covering about 1/16 to 1/2 inch. A mix of standard twist bits for metal and wood, plus brad-point bits for cleaner wood holes, handles most furniture fixes, pilot holes, and small hardware installations. If you drill masonry for shelves or curtain brackets, get masonry bits separately or choose a set that includes them.
Check the shank before buying. Most standard drills accept round shanks, while impact drivers need hex-shank bits or a suitable chuck adapter. An adapter works for occasional drilling, but a drill is usually steadier and easier to control for accurate holes. Browse general-purpose wood and metal drill bit sets if you need a basic kit.
For a home with drywall, brick, or concrete block, a few masonry bits are more useful than dozens of duplicate twist bits. If you regularly drill into concrete, a rotary hammer and SDS bits are a better match than trying to force a standard drill through the material.
Compare the main bit types
| Bit type | Best use | Trade-off |
|---|---|---|
| Twist | General holes in metal and wood | Versatile, but can wander on smooth surfaces and tear wood on exit |
| Brad-point | Clean, accurately placed holes in wood | Not for metal or masonry; tips can be damaged by careless use |
| Masonry | Brick, block, and some concrete with a hammer drill | Slow in hard concrete; ordinary drill mode may struggle |
| Step | Widening holes in thin sheet metal | Limited to thin stock and the sizes on the bit |
A mixed set is convenient, but the included accessories can make it look more complete than it is. Check the actual size range and count of each bit type. Sets with many tiny bits may leave out common sizes such as 1/4 or 3/8 inch. A compact case that keeps sizes legible is worth more than a loose pile of extras.
Match the bit to the material
For wood, a brad-point bit starts cleanly because its center point keeps it from skating. Twist bits also work, especially for rough holes or pilot holes. To reduce splintering, clamp scrap wood behind the workpiece, drill from both sides, or slow down as the bit exits. For screws, choose a pilot hole based on the screw’s core diameter and wood hardness; an undersized pilot can split the board, while an oversized one weakens the grip.
For steel and other metals, use a sharp high-speed steel (HSS) twist bit. Cobalt bits cost more and are useful for frequent work in harder metals, but they are unnecessary for occasional holes in thin household hardware. Keep the bit speed moderate, use steady pressure, and add cutting oil when drilling thicker steel. If the bit squeals, turns blue, or stops cutting, it is overheating or dull—forcing it can snap the bit.
Masonry bits have a carbide tip. Use hammer mode only when the drill and bit are designed for it, and start with a smaller hole if the final size is large. Hammering can chip tile, so switch to rotation-only for tile and use a tile-rated bit. For brick or block anchors, drill the hole to the anchor maker’s stated diameter and depth; an oversized or dust-filled hole can leave the anchor loose. Consider a masonry bit set for hammer drills if these jobs come up regularly.
Features that matter more than piece count
Look for clearly marked sizes, a sturdy case, and replaceable common sizes. A 1/4-inch hex shank is convenient in an impact driver, but impact-rated status matters: ordinary round-shank drill bits should not be treated as impact bits just because an adapter fits. For drilling with a cordless drill, check the chuck capacity—many home drills accept bits up to 3/8 inch, while some accept 1/2 inch.
Coatings can help resist rust or reduce friction, but they do not make a low-quality bit indestructible. Titanium nitride coatings wear away as the cutting edge is sharpened, so the claimed benefit does not last forever. For light repairs, an affordable HSS set is fine. If you often drill hard metal or rely on a few sizes, buy better replacement bits in those sizes rather than paying for a premium set full of pieces you will not use.
Use bits in ways that prevent breakage
Mark the hole, clamp the work, and let the bit cut instead of leaning hard on the drill. A punch helps keep a metal bit centered. For deep holes, withdraw the bit periodically to clear chips; packed chips increase heat and can jam the bit. Use eye protection, especially when drilling metal or overhead, and keep hands away from the spinning chuck.
Do not use a drill bit to drive screws, and do not assume a standard drill bit is safe in an impact driver. If you need both drilling and fastening, use a drill for holes and a driver bit in the impact driver for screws. A hex-shank set specifically rated for impact drivers can suit occasional drilling with that tool, but it is not a substitute for a full drill-bit selection.
For most homes, a modest wood-and-metal set plus a few correctly sized masonry bits is the practical starting point. Expand it when a real job calls for a specialty bit, rather than buying a large set on the assumption that every piece will be useful.