Updated March 2026 | By ToolShed Tested Team
Quick Answer: Match the drill bit to the material: use HSS (high-speed steel) twist bits for metal, brad-point bits for clean holes in wood, masonry bits with carbide tips for concrete and brick, spade bits for large rough holes in wood, and step bits for sheet metal. Using the wrong bit wastes time and damages both the bit and workpiece.
Drill Bit Types and When to Use Each One
Walking into the drill bit aisle can be overwhelming. There are dozens of styles, coatings, and materials—all designed for specific jobs. This guide cuts through the confusion so you always grab the right bit.
HSS Twist Bits — The All-Rounder
Best for: Metal, wood, plastic
High-speed steel twist bits are the most common and versatile. The spiral flutes carry chips out of the hole as you drill. Standard HSS handles soft metals like aluminum and mild steel, plus wood and plastic.
- Black oxide coating: Reduces friction, good for general use
- Titanium coating (TiN): Harder, stays sharp longer, better for metal
- Cobalt (M35/M42): Not a coating but an alloy—handles stainless steel and hardened metals
Brad-Point Bits — Clean Holes in Wood
Best for: Wood, plywood, some plastics
The sharp center point positions the bit exactly where you want it, and the spurs on the outside rim score the wood before the flutes cut. Result: clean, splinter-free holes. Essential for furniture-making, cabinetry, and any visible woodwork.
Masonry Bits — Concrete, Brick, and Stone
Best for: Concrete, brick, block, stone, tile
Identifiable by their wide, arrow-shaped carbide tips. Must be used with a hammer drill for concrete and brick. The hammering action cracks the material while the bit clears debris. Never use on metal or wood.
Spade (Paddle) Bits — Large Holes in Wood, Fast
Best for: Rough holes in wood for running pipes and wires
The flat, paddle-like shape bores large holes (up to 1-1/2″) quickly. Holes aren’t as clean as those from brad-point or Forstner bits, but they’re fast and cheap. Great for electrical and plumbing rough-in work.
Step Bits — Sheet Metal and Thin Materials
Best for: Sheet metal, electrical panels, thin plastic
The cone shape with graduated steps lets you drill multiple hole sizes with one bit. The stepped design won’t grab and tear thin materials the way a standard twist bit can.
Hole Saws — Large Diameter Holes
Best for: Doorknob holes, pipe penetrations, large openings
A hole saw is a cylindrical saw blade that attaches to a mandrel with a pilot bit in the center. Available in sizes from 3/4″ to 6″+. Use at low speed with firm, steady pressure.
Forstner Bits — Precision Large Holes in Wood
Best for: Flat-bottomed holes, overlapping holes, angled drilling in wood
Forstner bits cut the cleanest large holes in wood. They’re slower than spade bits but produce smooth, flat-bottomed cavities—ideal for concealed hinges, dowel joints, and decorative work.
Quick Reference Chart
| Material | Best Bit Type | Speed |
|---|---|---|
| Softwood | Brad-point or HSS twist | High |
| Hardwood | Brad-point or Forstner | Medium |
| Mild steel | HSS twist (TiN coated) | Low-Medium |
| Stainless steel | Cobalt twist | Low |
| Concrete/Brick | Masonry (hammer drill) | Medium |
| Sheet metal | Step bit | Low-Medium |
| Tile/Glass | Diamond-tipped or carbide spear | Low (with water) |
FAQ
Can I sharpen drill bits?
Yes. HSS twist bits can be sharpened with a bench grinder or a dedicated drill bit sharpener. Brad-point and masonry bits are harder to sharpen at home—it’s usually easier to replace them.
Do gold/black/silver colors mean anything?
Yes. Black bits have an oxide coating for general use. Gold/bronze bits are titanium-coated for longer life. Silver/plain bits are uncoated HSS. Cobalt bits are often a duller gold color.
How do I know when a bit is dull?
Signs include: needing excessive pressure, the bit generating heat instead of cutting, rough or oversized holes, and squealing sounds. A sharp bit should cut with moderate pressure.