Masonry drill bits for rotary impact drilling into brick, block, stone and concrete. Available in a wide range of diameters and lengths, from compact 3mm bits up to 25mm, covering everything from cable runs to structural fixings.
Size
Price
QTY
7.0 x 150mm
£1.08£1.30
6.5 x 150mm
£0.98£1.18
6.0 x 150mm
£0.98£1.18
5.5 x 150mm
£0.98£1.18
Rotary impact masonry drill bits are the bread and butter of any tradesperson who drills into hard materials day in, day out. Whether you’re fixing into brick, block, dense concrete or natural stone, you need a bit that can take sustained hammer action without folding, wandering or blunting after five holes. This range covers the most popular sizes in both diameter and length, so whether you’re sinking a short 3mm pilot or a 25mm bore through a cavity wall, there’s something here that does the job properly.
The carbide tip is what matters with masonry bits. Tungsten carbide inserts are brazed into the steel body to handle the percussive forces that rotary impact drilling generates. The flute geometry channels dust and debris up and out of the hole, which matters more than people think. A choked flute slows the bit, builds heat, and can cause the tip to work loose over time. These bits are designed to clear waste efficiently, which keeps penetration rates consistent and extends working life.
Where Rotary Impact Masonry Drill Bits Come Into Their Own
The range spans diameters from 3mm all the way to 25mm, with lengths from 75mm up to 400mm. That spread is deliberate. Smaller diameters in shorter lengths suit cable and conduit work, fitting back boxes, or installing plugs and fixings in wall tiles and brickwork. Mid-range sizes, say 8mm to 12mm at 150mm to 200mm, are the workhorses for general fixing, frame anchors and masonry bolt installations. The longer shanks, 300mm and 400mm, are used when you need to get through cavity walls cleanly, or when you’re core-drilling a path for large pipework and need the bit to travel straight over a longer distance without wandering.
Matching Length to the Job
It’s easy to default to whatever bit is closest on the van, but length selection genuinely affects the result. A bit that’s too short for the depth required means you’re drilling in stages, repositioning, and risking an angled bore. Too long, and you lose rigidity, especially on the wider diameters. Pick the shortest bit that comfortably reaches the required depth with a little clearance for dust accumulation at the tip. You’ll get a cleaner hole and the bit will last longer for it.
These are sold individually, which makes sense when you need a specific size to replace a worn bit or fill a gap in the kit without buying a full set. At this price point, keeping a spare of each common size in the bag is just sensible site practice.
Pro Tip: When drilling deep holes with a long masonry bit, withdraw the bit every 30 to 40mm and clear the flutes, especially in dense concrete where dust packs quickly and causes the bit to overheat and lose its edge far sooner than it should.
Rotary impact masonry drill bits are used across virtually all trades that work with masonry structures. Electricians use the smaller diameters for back boxes and cable routes, while plumbers reach for the mid to large sizes when chasing through walls for pipe runs. General builders and fixers use them constantly for frame anchors, expansion bolts, and structural fixings into brick and block. The longer lengths come into their own on cavity wall construction, where you need clean through-bores without the bit losing direction partway through. Landscapers and groundworkers use the larger diameters for posts, gate hardware and drainage fixings into stone or concrete bases.
Best For
Drilling into brick and block
Concrete and dense aggregate
Natural stone and sandstone
Fixing anchors and masonry bolts
Cable and conduit routes
Cavity wall through-bores
Works With
Standard SDS-plus rotary hammer drills
Rotary impact combi drills
Cordless and corded hammer drills
Standard round shank chucks
Key Specifications
Diameters: 3mm to 25mm
Lengths: 75mm to 400mm
Tungsten carbide tipped
Spiral flute for dust clearance
For use in rotary impact mode
Not suitable for: Not intended for drilling into steel, timber or plastics — use appropriate metal or wood drill bits for those materials. These bits should not be used in rotation-only mode on very hard materials such as engineering brick or granite without hammer action, as this will blunt the tip rapidly.
Fit the bit securely into the chuck and set the drill to hammer or rotary impact mode. Apply steady, moderate pressure, letting the hammering action do the work rather than forcing the bit. Pushing too hard on smaller diameter bits in particular increases the risk of tip breakage or a wandering bore.
For holes deeper than 100mm, withdraw the bit periodically to clear dust from the flutes. In dusty or crumbling masonry, this is especially important as packed debris reduces penetration speed and generates excess heat. Mark your required depth on the bit with tape so you know when you've reached the anchor seating depth without having to stop and measure repeatedly.
Select the correct diameter and length for your fixing or clearance requirement
Insert the bit fully into the chuck and tighten securely, checking there is no lateral play
Set the drill to rotary impact or hammer drill mode
Mark the required depth on the bit shank with masking tape
Position the bit perpendicular to the surface and start at low speed to establish the pilot point before increasing to full speed
Apply consistent, moderate forward pressure and allow the hammer action to drive penetration
Withdraw the bit every 30 to 40mm on deeper holes to clear the flutes and prevent heat build-up
Stop drilling once the tape depth marker reaches the surface and blow or brush dust from the hole before inserting the fixing
Will these bits work in a standard combi drill or do I need an SDS drill?
These are round shank bits designed for standard chuck fitting, so they work in any combi drill with a hammer setting. For larger diameters above 16mm or heavy sustained drilling into dense concrete, an SDS rotary hammer will outperform a combi drill and put less strain on both the bit and the tool. For general fixing work in brick and block up to 12mm or so, a good cordless combi drill handles these comfortably.
How do I know which length to choose for the job?
As a general rule, choose the shortest bit that comfortably reaches your required drilling depth with around 20 to 30mm of clearance at the tip for dust. Longer bits are less rigid and more prone to wandering, particularly in larger diameters. Reserve the 300mm and 400mm lengths for cavity wall situations or where you genuinely need the reach, not as a default choice.
These masonry drill bits feature a tungsten carbide tip brazed to a steel body with a spiral flute profile designed for rotary impact drilling. The carbide insert handles the compressive and percussive forces generated in hammer mode, while the flute geometry provides continuous dust extraction from the bore. Round shank fitting is compatible with standard keyed and keyless chucks across cordless and corded platforms.
Tip Material
Tungsten carbide
Shank Type
Round (standard chuck)
Drilling Mode
Rotary impact / hammer drill
Diameter Range
3.0mm to 25.0mm
Length Range
75mm to 400mm
Sold As
Individual bits
Size
5.5 x 100mm, 6.0 x 100mm, 6.0 x 150mm, 6.0 x 200mm, 8.0 x 120mm, 8.0 x 150mm, 8.0 x 200mm, 8.0 x 300mm, 10.0 x 120mm, 10.0 x 150mm, 10.0 x 200mm, 10.0 x 300mm, 10.0 x 400mm, 12.0 x 150mm, 12.0 x 200mm, 12.0 x 300mm, 12.0 x 400mm, 14.0 x 150mm, 14.0 x 200mm, 14.0 x 300mm, 14.0 x 400mm, 16.0 x 150mm, 16.0 x 200mm, 16.0 x 400mm, 18.0 x 160mm, 20.0 x 160mm, 20.0 x 200mm, 20.0 x 400mm, 25.0 x 400mm, 3.0 x 75mm, 4.0 x 150mm, 4.0 x 85mm, 5.0 x 150mm, 5.0 x 85mm, 5.5 x 150mm, 6.0 x 300mm, 6.0 x 400mm, 6.5 x 100mm, 6.5 x 150mm, 7.0 x 100mm, 7.0 x 150mm, 7.0 x 200mm, 7.0 x 300mm, 8.0 x 400mm
Box Quantity
1
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