Types of Drill Bits and Router Bits: A Guide from Your Hardware Shop in Deira Dubai

Drill bits are chosen by the material being drilled: masonry bits (carbide tip) for concrete and brick, HSS (high-speed steel) bits for metal and wood, brad-point wood bits for timber and plywood, spear-point bits for glass and tiles, SDS bits for heavy concrete drilling with a rotary hammer, and screwdriver bits for driving fasteners. Router bits are chosen by the profile they cut: straight bits for grooves, flush trim bits for copying an edge, round over, chamfer, beading and ogee bits for decorative edges, and panel pilot bits for cutting openings. The Robustline and COMO ranges cover all of these and are stocked at Safinat Group, your hardware shop in Deira Dubai at Nakheel Centre, Naif, with the same range at our hardware shop in Al Qusais and hardware shop in Al Quoz.

Why the bit matters more than the drill

A cordless drill or a router is only a motor. The bit decides whether the hole is clean, whether the edge is smooth, and how long the job takes. Using a wood bit on brick blunts it in seconds; using a masonry bit on steel will not cut at all; using the wrong router bit leaves burn marks and tear-out that no amount of sanding fixes. Carpenters, electricians, plumbers and fit-out crews who buy from our hardware shop in Deira Dubai usually carry a small set of each type so the right bit is always in the case.

This guide covers the seven drill bit types and seven router bit types in the Robustline and COMO ranges, what each is for, and how to tell them apart at the counter.

Part 1: Types of drill bits

1. Masonry drill bit

A steel shank with a tungsten carbide tip brazed on. The tip is wider than the shank so dust clears up the flutes. Used in hammer mode on a standard drill.

For: concrete, brick, block, plaster, render. Fixing anchors, wall plugs, brackets and conduit clips.

2. HSS drill bit

High-speed steel twist drill with a 118 or 135 degree point. Fully ground flutes cut metal cleanly and also work in wood and plastic. Black-oxide or bright finish.

For: mild steel, aluminium, brass, plastics and wood. Drilling steel frames, brackets, sheet metal and pilot holes.

3. Wood drill bit (brad point)

A sharp centre spur and two cutting spurs on the outer edge. The spur stops the bit wandering and the outer spurs score the surface before the flutes remove material, so the hole has a clean rim.

For: softwood, hardwood, plywood and MDF (medium-density fibreboard). Dowel holes, hinge holes, cabinet and furniture assembly.

4. Glass and tile drill bit

A spear-shaped tungsten carbide tip on a round shank. Used without hammer, at low speed, with water to cool the tip.

For: ceramic tiles, porcelain, glass, mirrors. Bathroom fittings, kitchen splashbacks, shower screens.

5. SDS drill bit

Carbide-tipped bit with an SDS (slotted drive system) shank that locks into a rotary hammer and lets the bit move back and forth while the chuck holds it. Hammer force is delivered directly to the bit.

For: heavy concrete, reinforced slabs, stone. Anchor holes for scaffolding, heavy brackets, through-wall holes for pipes and cables.

6. High-speed drill bit (precision)

A fine-ground HSS bit with a split point that starts the hole without a centre punch and cuts with less pressure. Sold in small size steps for accurate hole diameters.

For: fast, accurate drilling in metal and hardwood where hole size matters: tapping holes, rivet holes, hardware fitting.

7. Screwdriver bit

Hardened steel bits with a 1/4 inch hex shank for impact drivers and drill chucks. Phillips (PH), Pozidriv (PZ), slotted, Torx and hex heads.

For: driving screws into wood, metal and plasterboard. Decking, framing, cabinet assembly, drywall.

Drill bit selection table

MaterialBit to useDrill modeConcrete, brick, blockMasonryHammerHeavy or reinforced concreteSDSRotary hammerSteel, aluminium, brassHSS or precision HSSRotation, low speedSoftwood, hardwood, plywood, MDFWood (brad point)Rotation, high speedTiles, porcelain, glassGlass/tileRotation, low speed, no hammerDriving screwsScrewdriver bitDriver or impact

Part 2: Types of router bits

Router bits run at 10,000 to 30,000 rpm, so the bit must be sharp and balanced. The Robustline and COMO router bits use tungsten carbide cutting edges on a steel body, with a bearing on edge-following bits.

1. Round over bit

A concave quarter-round profile with a bearing pilot. Rounds a square edge to a set radius.

For: table tops, shelf edges, chair parts, children's furniture. Softening edges so laminate and paint do not chip.

2. Chamfer bit

A 45 degree angled cutter with a bearing. Cuts a flat bevel on the edge.

For: decorative bevels, easing sharp edges, mitred box joints, door and panel edges.

3. Straight bit

Two straight carbide flutes on a plain shank. Cuts a flat-bottomed groove or dado the width of the bit.

For: grooves for drawer bottoms and cabinet backs, dados for shelves, mortises, inlays, template work with a guide bush.

4. Flush trim bit

A straight cutter with a bearing the same diameter as the cutter. The bearing follows a template or an existing edge and the cutter trims the workpiece to match.

For: trimming laminate and veneer flush, copying shapes from a template, cleaning up edges on plywood and MDF.

5. Beading bit

Cuts a rounded bead with a small step (fillet) on each side. Bearing-guided.

For: classic edge detail on cabinet doors, picture frames, mouldings and skirting.

6. Ogee bit

An S-shaped profile combining a concave and a convex curve. Bearing-guided.

For: decorative edges on table tops, door frames, raised panels and furniture trim.

7. Panel pilot bit

A straight cutter with a drill-point tip and a pilot section below the cutting edge. The point plunges through the panel and the pilot follows the frame or template underneath.

For: cutting openings in panels for sockets, vents and windows; trimming plasterboard and sheet material to a frame.

Router bit selection table

JobBit to useSoft, rounded edgeRound overFlat bevelled edgeChamferGroove, dado or slotStraightTrim laminate or copy a templateFlush trimClassic bead detailBeadingDecorative S-curve edgeOgeeCut an opening in a panelPanel pilot

Buying tips

• Buy sets by material, not by count. A 5-piece masonry set, a 13-piece HSS set and a 6-piece brad-point set cover nearly every site job. Large assorted sets are mostly sizes you will never use.
• Match the shank to the tool. SDS bits only fit rotary hammers; 1/4 inch hex driver bits fit impact drivers; router bits come in 1/4 inch and 1/2 inch shanks, and the collet must match.
• Check the tip. On masonry and tile bits the carbide tip should be centred and free of chips. On router bits the carbide edges should be bright and uniform.
• Speed and lubrication. Metal is drilled slowly with cutting oil; wood fast and dry; tiles slowly with water. Running an HSS bit too fast in steel is the most common reason it goes blunt.
• Replace, do not force. A blunt bit overheats the drill, wanders and leaves a ragged hole. Bits are inexpensive compared to the time they cost, and any hardware shop in Deira Dubai, Al Qusais or Al Quoz will have the common sizes on the shelf.

Where to buy drill bits and router bits: hardware shop in Deira Dubai

Safinat Group stocks the Robustline Professional Tools and COMO drill bit and router bit ranges at all branches, with individual sizes and boxed sets available for trade and retail customers. Deira has been Dubai's hardware district for decades, and our Nakheel Centre branch is where workshops and contractors in the area restock bits by the box.

• Hardware shop in Deira Dubai: Safinat Group, Nakheel Centre, Naif, Deira. +971 4 228 5012.
• Hardware shop in Al Qusais: Safinat Al Sahraa Trading Co LLC, Al Qusais, +971 55 576 9729.
• Hardware shop in Al Quoz: Safinat Al Bahar Building Materials LLC, Al Quoz Industrial Area, +971 55 560 3213
  Al Quoz New, 30 First Al Khail Street, +971 54 994 1905.

Contractors and workshops can ask any branch for set pricing and bulk quantities. Delivery across the UAE and export to GCC, African and CIS markets is available.

FAQs

How do I tell a masonry bit from a wood bit?

A masonry bit has a wider, flat carbide tip brazed onto the end of the shank. A wood brad-point bit has a sharp centre spur with two raised cutting spurs on the outer edge. An HSS metal bit has a plain conical point with no tip insert.

Can I use an HSS drill bit on wood?

Yes. HSS bits drill wood well, though a brad-point bit gives a cleaner hole with less splintering at the entry. HSS bits should not be used on brick, concrete or tile.

What is the difference between SDS and masonry drill bits?

Both have carbide tips, but SDS bits have a special shank that locks into a rotary hammer and takes much stronger hammer blows. Standard masonry bits have a round shank for a normal drill chuck and are used in light hammer mode.

Which router bit do I use to round off a table edge?

A round over bit. Choose the radius to match the thickness of the top; a 6 mm radius suits 18 mm board, a 12 mm radius suits thicker tops.

What is a flush trim bit used for?

Trimming an overhanging edge, such as laminate, veneer or a plywood layer, exactly flush with the surface below. The bearing runs on the lower surface while the cutter trims the overhang.

Do router bits fit any router?

The shank must match the router collet, usually 1/4 inch or 1/2 inch. Check the collet size before buying; many trim routers take 1/4 inch only.

Which hardware shop in Deira Dubai sells Robustline and COMO drill bits?

Safinat Group at Nakheel Centre, Naif, Deira stocks both ranges. Call +971 4 228 5012 to confirm sizes.

Do the Al Qusais and Al Quoz branches stock the same bits?

Yes. Our hardware shop in Al Qusais and hardware shop in Al Quoz carry the same Robustline and COMO drill bit and router bit ranges as Deira, so you can collect from whichever branch is closest.

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