Walk into any hardware shop and ask for a drill, and you'll likely get a question back: what kind? That trips up a lot of first-time buyers, because most people assume a drill is a drill. In reality, the word covers several different tools, each built for different jobs, and picking the wrong one is one of the most common and most avoidable mistakes people make with home projects and light repairs.
This guide explains what a cordless drill is, how it works, how it compares with impact drills, impact drivers and impact wrenches, and how to use one safely.
What makes a drill cordless
The obvious answer is that it runs on a battery instead of a power cord, but that changes more than convenience. Cordless drills use rechargeable battery packs, usually lithium-ion, which hold enough charge for bursts of drilling and screw-driving without being tied to a socket.
That means you can work anywhere: a garden fence, a car interior, a roof, a site without power, all without hunting for an extension cable. The trade-off is that battery life and charging become part of the decision, which is why battery voltage, capacity and whether a second battery is included are worth checking when you compare models.
How a cordless drill works
Inside the housing, a small electric motor turns the chuck, which holds the bit. The trigger controls speed, and most drills have a clutch: a numbered ring that limits how much torque is applied before the chuck slips. That's what stops screws being driven too deep or stripped.
Most drill drivers also have a gear selector: a low-speed, high-torque setting for driving screws and a higher-speed setting for drilling holes. Using the right one for the task is what separates clean results from stripped screws and overworked motors.
To compare battery voltages, chuck sizes and what comes in the box, browse our cordless drills and screwdrivers side by side.
Drill driver, impact drill, impact driver or impact wrench?
The names are confusingly close, so here they are side by side:
| Tool | What it does | Holds | Best for |
|---|---|---|---|
| Drill driver | Smooth rotation with a clutch | Round or hex bits in a chuck | Wood, drywall, light metal, furniture assembly, everyday screws |
| Impact drill (also called a hammer drill) | Rotation plus a fast forward-and-back hammering action | Masonry, wood and metal bits in a chuck | Drilling into brick and block walls for anchors, shelves and fixtures; also works as a normal drill with hammer off |
| Impact driver | Rotation with short bursts of turning force | Hex driver bits | Driving long screws and many screws quickly, without the bit slipping out |
| Impact wrench | Very high torque in short pulses | Sockets on a square drive | Wheel nuts, large bolts, car and machinery work |
| Rotary hammer | Stronger piston-driven hammering | SDS bits | Frequent or heavy concrete drilling and light chiselling |
A simple way to remember it: drill drivers for everyday jobs, impact drills for occasional masonry, impact drivers for fastening, impact wrenches for nuts and bolts, and rotary hammers for serious concrete work. For heavy drilling machines and what they cost, see our hammer drill machine price guide for Kuwait.
How the impact (hammer) action works
Inside an impact drill, two ridged discs sit against each other. In hammer mode, when you press forward, they ride over each other as they turn, adding a rapid forward-and-back tapping on top of the rotation. That combination lets the bit chip its way through brick and block instead of just rubbing against it. Most models let you switch the hammer action off, so the same tool drills wood and metal normally. A 16.8V cordless impact drill with two batteries is from 12.000 KD.
An impact drill is not a replacement for a rotary hammer. For regular concrete drilling, a rotary hammer is the right tool.
Impact driver vs impact wrench
Both deliver bursts of turning force, which is why they're mixed up. The impact driver is tuned for screws: it takes hex bits and gives you control on long screws, decking and cabinets. The impact wrench is built for much higher torque on nuts and bolts and takes sockets, which is why it's the tool for wheel changes and machinery. An impact driver usually falls short on wheel nuts, and an impact wrench is too strong and hard to control for small screws. They don't share bits either. If car and garage work is your main job, our 20V cordless impact wrench with two batteries is 59.000 KD, and there are air impact wrenches from 19.950 KD for workshops with a compressor.
What a good cordless drill needs
It depends on the job, but a few features matter across the board:
- A clutch with several torque settings, not one fixed setting
- A battery voltage that matches the workload; light jobs don't need the biggest, heaviest battery
- A second battery, so one charges while you work
- A comfortable grip and manageable weight, since a heavy tool is harder to hold steady
- A keyless chuck for quick bit changes on mixed-material jobs
For most homes, a drill in the 16.8V–21V range with two batteries covers furniture, shelves, curtain rails and small repairs. Our 21V cordless drill with two batteries and drilling accessories is from 13.500 KD; a 16.8V version is from 11.500 KD, and a 20V 13mm brushless drill is from 16.450 KD.
How to use a cordless drill safely
Set it up before you start
- Chuck: tighten the bit firmly so it can't slip mid-job; a slipping bit is a common cause of stripped screw heads.
- Clutch: low numbers for soft materials, thin wood and wall plugs; higher numbers for dense wood or metal.
- Mode: drill mode for holes, screw mode for driving, hammer mode only for brick or block.
Step by step
- Pick the right bit for the material. Wood, masonry and metal bits aren't interchangeable; the wrong one damages the material or wears out fast.
- Mark the spot. A pencil mark, and a light centre-punch dent on hard surfaces, stops the bit wandering.
- Start slow. Let the bit bite at low speed, then speed up once it's running straight.
- Keep the drill square to the surface. Even a slight angle makes holes crooked or oversized.
- Ease off near the end. Slowing down as the bit breaks through stops wood splintering and tile or plaster cracking.
Safety basics
- Wear eye protection, especially when drilling masonry, which throws more dust and chips.
- Use both hands and the side handle (if there is one) in hammer mode; it twists harder than a normal drill.
- Let the tool do the work. Pushing too hard causes the bit to bind or the drill to kick.
- Check for hidden cables and pipes before drilling into walls.
- Remove the battery before changing bits, and test clutch settings on a scrap piece first.
- Take short breaks during long hammer-drilling jobs; tired hands mean less control.
Common mistakes and misunderstandings
- Assuming higher voltage always means a better drill. It mainly means more power and more weight, not more control.
- Pushing a standard drill driver into concrete or brick. That's a hammer drill's job, and a regular drill can struggle or overheat.
- Running every job at full torque, which strips screws and cracks materials.
- Forgetting to change the clutch or mode when switching between screws and holes.
- Using ordinary bits in hammer mode; they wear quickly and drill poorly in masonry.
- Buying an impact wrench for screws, or an impact driver for wheel nuts.
- Treating battery life as capacity only. How you charge and store the battery matters too; don't leave it in a hot car.
Choosing the right tool
A cordless drill is, at its core, a battery-powered motor turning a chuck, but torque, gear settings and drill type decide whether it handles your projects well. Someone assembling flat-pack furniture needs something very different from someone fixing shelves into a block wall or changing car wheels. A few minutes spent matching the tool to the work saves money and the hassle of buying twice.
Want to hold a few before you choose? Visit our showroom at Shuwaikh Plaza, Khalifa Al-Jassim Street, Shuwaikh Industrial, or contact us with the job you have in mind. Bab Al-Saif has served Kuwait since 1992 (4.7★ from 350+ Google reviews), with cash on delivery, card or Deema instalments and delivery across Kuwait.
FAQs
Is a cordless drill the same as an impact driver?
No. A drill driver turns smoothly and suits general drilling and screw-driving. An impact driver adds short bursts of turning force, which makes it better for long screws and tougher fastening, but it takes hex bits and isn't meant for drilling precise holes.
What voltage cordless drill do I need for home use?
For most household jobs, a drill in the 12V–21V range is enough. Higher-powered tools are for heavier, more frequent work.
Can a cordless drill be used on concrete or brick?
A standard drill driver can't do it well. Use an impact (hammer) drill with masonry bits for occasional brick or block work, and a rotary hammer for regular concrete drilling.
What clutch setting should I use for screws?
Start low and increase step by step until the screw sits flush without stripping. Soft materials need less torque; hard wood needs more.
