Using the wrong drill bit type is one of those mistakes that damages the bit instantly and teaches you a hard, expensive lesson. A masonry bit in wood looks like it works for a second, then suddenly you’ve got a mangled hole and a destroyed bit. This guide shows you the differences, how to spot them instantly, and what happens when you use the wrong one.
Visual Identification: How to Tell Them Apart Instantly
The difference is visible from 30 centimetres away if you know what to look for:
Masonry bits have a blunt, arrow-shaped carbide tip (the yellow or orange-brown part at the nose of the bit). The tip looks almost like a chisel point, flattened and aggressive. If you flip the bit upside down, the cutting edge comes to a sharp tip but the back half is flat and bevelled.
Wood bits (also called twist drills or HSS bits for wood) have two sharp, spiralling cutting edges. The nose comes to a fine point. There’s no blunt carbide tip, and the edges are shiny steel (unless they’re titanium-coated, which looks gold or bronze).
If you’ve got a mixed set and you’re unsure, hold them up to the light. The masonry bit’s carbide tip is obviously different from the sharp steel point of a wood bit.
Detailed Comparison: Feature by Feature
| Feature | Masonry Drill Bit | Wood Drill Bit |
|---|---|---|
| Tip shape | Blunt, arrow-shaped, flat back | Sharp point, spiralling flutes |
| Material | Carbide-tipped (yellow/orange-brown) | High-speed steel (HSS) or cobalt |
| Cutting action | Hammers and scrapes (with hammer function on) | Cuts and spirals chips out |
| Cutting edges | One flat tip, bevelled sides | Two sharp spiral edges |
| Best materials | Brick, block, concrete, stone, tile | Softwood, hardwood, plywood |
| In wood (wrong tool) | Tears grain, oversized holes, dull fast | n/a |
| In masonry (wrong tool) | n/a | Instantly destroys cutting edges |
| Rotation speed | 500–1000 rpm (with hammer on) | 1000–3000 rpm depending on material |
| Pressure needed | Light (let the hammer do the work) | Moderate to heavy |
| Cost | £0.80–2.00 per bit | £0.50–1.50 per bit |
How Masonry Bits Work
Masonry bits are designed to work with the hammer function on your drill. The blunt carbide tip isn’t meant to cut cleanly — it’s meant to smash and scrape the material away. Thousands of tiny impacts from the hammer, combined with slow rotation, break down brick, block, or concrete.
The carbide material is incredibly hard. That’s what lets it withstand thousands of hammer blows without the edge getting damaged. Steel couldn’t survive that punishment.
Masonry bits work best with:
- A cordless combi drill with hammer function on
- Slow speed (500–800 rpm)
- Light to moderate pressure (let the hammer do the work)
- Regular breaks to clear dust and let the bit cool
Because of the hammering action, masonry bits are noisy and produce fine dust rather than chips. Wear a mask and ear protection.
How Wood Bits Work
Wood bits (twist drills) have two sharp spiral edges that cut into the grain and push the shavings up and out of the hole. The sharp point centres the hole and the cutting edges slice cleanly into the material.
Wood bits don’t need hammer action. In fact, hammer action on a wood bit is pointless and will just dull it faster. The spiral design lifts the chips out as you drill, so the hole stays clear and cool.
Wood bits work best with:
- A cordless drill without hammer function (or hammer turned off)
- Speed: 1000–2000 rpm for softwood, 500–1500 rpm for hardwood
- Steady, moderate pressure
- Brad point or spurred bits for extra precision
What Happens When You Use the Wrong Bit
Masonry Bit in Wood (Wrong Material)
A masonry bit in wood technically “works” for a few seconds, then things go wrong fast:
- The blunt tip doesn’t cut cleanly — it smashes the grain fibres rather than cutting them
- The hole comes out oversized and rough with torn wood fibres radiating out
- The carbide tip gets dulled and chipped by the softer wood (wood doesn’t need a hammer to destroy).
- The bit overheats because it’s not designed to shed chips from wood
- You get a ragged, ugly hole that needs filling and sanding
The bit isn’t permanently destroyed, but it’s now less sharp than it was. Do it repeatedly and you’ll dull the carbide tip significantly.
Wood Bit in Masonry (Wrong Material)
This is much worse. A wood bit in concrete or brick:
- The sharp steel edges strike the hard material and instantly chip or snap off
- After the first contact, the cutting edges are destroyed and you’re drilling with a blunt stub
- The bit binds up and overheats because it’s no longer cutting
- You’ll hear the drill strain and the bit will likely snap if you keep pressure on it
The bit is ruined. You can’t resharpen a wood bit effectively, and even trying will bend or break what’s left of the edges.
Multi-Material Bits: Do They Work?
Yes, but they’re a compromise. Multi-purpose drill bits (sometimes called “universal bits”) have a carbide tip like a masonry bit but sharper edges than a true masonry bit. They work reasonably well in both wood and light masonry.
The catch: they don’t excel at either job. In wood, they’ll leave a slightly rougher finish than a proper wood bit. In masonry, they’re slower than a true masonry bit and you’ll get better results with the hammer function off or used lightly.
Multi-purpose bits are useful if:
- You’re drilling a few pilot holes in plasterboard before tapping into a brick wall behind
- You’re doing mixed-material work (timber framing with masonry backup) and don’t want to swap bits constantly
- You want one general-purpose set for occasional home repairs
For any serious or frequent work, buy the right bit type. Multi-purpose bits are penny-wise, pound-foolish.
How to Spot Them in a Mixed Set
If you’ve inherited a mixed set or grabbed a job lot from a car boot sale, here’s how to sort them:
Visual check: Spread them out and look at the tips. Masonry bits have visible yellow/orange-brown carbide tips; wood bits are shiny steel. This alone will sort 90% of a mixed set.
Magnet test: Run a magnet over the tips. Steel wood bits stick to the magnet; carbide tips don’t. (This works if the carbide is exposed; plated versions might stick very slightly.)
Weight test: Hold them side-by-side. Carbide-tipped masonry bits are noticeably heavier for the same length because carbide is denser than steel.
Tap test: Carefully tap the tips on a concrete step. A wood bit’s point will bend or dull; a masonry bit’s carbide tip will click and not mark. (Be gentle — don’t break anything.)
Storage and Organisation Tips
Keep masonry and wood bits separate. Use different boxes, pouches, or drawer sections. Label them clearly. This prevents the most common accident: grabbing the wrong bit in a rush.
Some sets come in labelled cases (blue for masonry, red for wood, etc.). These are worth buying because they force you to keep things organised.
Store bits dry. Masonry bits won’t rust (carbide doesn’t), but wood bits can oxidise if left in damp conditions. A silica packet or a dry cloth in the box helps.
Bit Types: Wood Bit Varieties
Twist Drill (Standard HSS)
The basic wood bit with two spiral flutes. Cheap, reliable, works in softwood and hardwood. Not as precise as brad point but good for general use.
Brad Point Bit
Sharpened centre point and two cutting spurs mean more precise holes with less tearout. Better for hardwood and visible work.
Spurred Bit
Similar to brad point but with more aggressive spurs. Great for very clean entry holes. Slightly more expensive.
Spade Bit (Paddle Bit)
Fast and rough. Wider blade but less precise. Good for rough construction work, not cabinet work.
Bit Types: Masonry Bit Varieties
Standard Masonry Bit
General-purpose carbide-tipped bit for brick, block, and soft concrete. Works with hammer drill on 500–1000 rpm.
TCT (Tungsten Carbide Tipped) Masonry Bit
Tougher carbide for hard concrete and reinforced brickwork. More expensive but lasts longer on tough jobs.
SDS Plus Masonry Bit
Uses the SDS Plus shank and only fits SDS rotary hammers. Not compatible with standard cordless drills — don’t confuse the shank type.
Watch: Video Guide
Frequently Asked Questions
Can You Use a Masonry Bit Without Hammer Function?
Technically yes, but it’s slow and inefficient. Masonry bits are designed for hammering action. Without it, you’re just using blunt edges to scrape very slowly. Use a wood bit instead.
What’s the Shank Size Difference?
Most standard wood bits and masonry bits have round shanks (2mm, 3mm, 6mm, 8mm, 10mm) that fit any regular drill chuck. SDS Plus bits have a locking shank that only fits SDS Plus drills — they’re not interchangeable.
Why Do Wood Bits Get Hot When Drilling Masonry?
Because the edges are being destroyed. Friction on the blunt, chipped edge generates heat. The bit isn’t cutting anymore, it’s just sliding and grinding. Stop immediately before it snaps.
Can You Sharpen a Damaged Wood Bit?
Small touch-ups yes, but major damage (like from trying to drill masonry) means the bit is done. The geometry is compromised. Replace it — a new bit costs 50p and saves you frustration.
Is a Cordless Combi Drill Strong Enough for Masonry?
Yes, modern 18V and 20V combi drills (with hammer function) work well for pilot holes and small holes in brick. For heavy concrete work or large holes, a dedicated rotary hammer is faster and easier on the tool.
What’s the Best First Bit Set to Buy?
Buy two: a wood bit set (13-piece, 2–10mm) and a masonry bit set (8-piece, 4–10mm). Keep them separate. Cost is around £8–12 for both. You’re covered for 90% of home and light trade work.
