15pc Masonry Drill Bit Set 5.5mm to 10mm

This 15-piece masonry drill bit set gives you the core sizes needed for everyday fixing work into brick, block, concrete and stone. The range runs from 5.5mm through to 10mm, covering the plugs and fixings most commonly used on domestic and commercial jobs. Rather than giving you one of each and calling it a day, this set includes multiples of the sizes you actually burn through, so you are not stopping mid-job to source a replacement.

Masonry bits take punishment. They hit hard spots, encounter rebar, and generally lead harder lives than their wood-drilling cousins. Having a spare 6mm or 7mm bit in the van means the difference between finishing a job and driving to the wholesaler. This set acknowledges that reality. The included sizes are 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm and 10mm, with duplicates across the range to give you that backup when you need it.

What This Set Covers

The 5.5mm to 7mm bits handle lighter fixings, cable clips, small brackets and trim work. The 7.5mm and 8mm sizes suit standard brown and red wall plugs, which account for the majority of domestic fixing. The 10mm bit steps up for heavier brackets, boiler flues, external fixings and anywhere you need a chunkier plug to take real load. Between them, you have got the spread for most first-fix and second-fix masonry work without carrying a dozen separate cases.

These are tungsten carbide tipped bits designed for use with SDS and standard chuck rotary drills in hammer mode. The carbide tip does the cutting while the flutes clear dust from the hole. Keeping the hole clear matters more than most people realise. A clogged hole means the bit works harder, heats up faster, and dulls quicker. Let the drill do the work, clear the hole periodically on deeper fixings, and your bits last noticeably longer.

Practical Considerations

Masonry drilling generates dust. On older properties, that dust may contain silica, and on anything pre-2000 there is always the asbestos question for internal walls. Appropriate dust extraction or suppression is not optional on commercial sites and is sensible everywhere. A set like this paired with a decent vacuum attachment turns fixing work from a coughing fit into a clean operation.

The bit diameter you choose should match your plug, not your screw. A 6mm bit takes a 6mm plug, and then you select your screw to suit the plug. Going too large on the bit gives you a loose plug that pulls out under load. Going too small means forcing the plug in and cracking the masonry. Match the bit to the plug, match the plug to the load, and your fixings stay where you put them.

For harder materials like engineering brick or dense concrete, slow your speed and increase pressure slightly. Let the hammer action break up the material rather than trying to force through on speed alone. The bit lasts longer and the hole stays cleaner. On softer blocks and aerated concrete, you can often drop out of hammer mode entirely to avoid blowing out the back of the material.

This set suits electricians running cables and mounting back boxes, plumbers fixing pipe clips and brackets, carpenters hanging doors and fitting ironmongery, and general builders doing the thousand small fixings that hold a building together. It covers the bread and butter work without weighing down your kit or complicating your storage. Fifteen bits, one case, sorted.