If you are setting up a home workshop or tackling your first serious DIY project, you have likely wondered whether you need a drill, an impact driver, or both. These two tools look similar but serve different purposes. A drill is the general-purpose tool for drilling holes and driving screws with control. An impact driver delivers high torque in rapid bursts, making it ideal for long screws, lag bolts, and deck screws. This article explains how each tool works, where each excels, and which one you should buy first.
How each tool works
Understanding the mechanism inside each tool helps you choose the right one for a task.
Drill
A cordless drill uses a motor and a gear train to spin a chuck. The chuck accepts round-shank bits, including drill bits and screwdriver bits. You control the speed with the trigger, and a clutch lets you set a torque limit so you stop driving a screw before it strips or sinks too deep. Drills produce continuous rotation. They are quiet and smooth compared to impact drivers.
Impact driver
An impact driver also has a motor, but instead of a chuck it has a collet that accepts bits with a 1/4-inch hex shank. Inside the tool, a hammer-and-anvil mechanism delivers short, powerful rotational impacts. Each impact can be several times the torque of the motor alone. This allows the driver to sink long screws and lag bolts without stalling or twisting your wrist. The hex shank prevents the bit from slipping in the collet. For more detail, see our guide on impact drivers.
Driving screws
This is where the two tools diverge most clearly.
When to use a drill
A drill works well for driving small to medium screws into softwood or drywall. The clutch gives you precise control. For example, you can set a low torque to drive cabinet screws without stripping the head or damaging the workpiece. A drill is also the better choice for screws in thin metal or plastic, where an impact driver’s bursts could crack the material.
When to use an impact driver
An impact driver shines with long fasteners, deck screws, and lag bolts. The rotational impacts let you drive a 3-inch screw into hardwood without predrilling in many cases. The tool does most of the work, so your wrist and forearm tire less. For deck building, fence repair, or assembling a heavy-duty shelf, an impact driver saves time and effort. Always use impact-rated driver bits; standard bits can snap under the torque.
Drilling holes
Only one of these tools is designed for drilling.
Drill is the clear choice
A drill accepts round-shank twist bits, spade bits, hole saws, and Forstner bits. You can drill into wood, drywall, metal, plastic, and masonry (with the right bit). The clutch is not used when drilling; you rely on speed and pressure. A drill also has a hammer drill mode on some models for masonry. An impact driver cannot accept round-shank bits without an adapter, and the adapter adds wobble and reduces control. For clean, accurate holes, always reach for a drill.
Can an impact driver drill holes?
Technically, you can buy hex-shank drill bits that fit an impact driver. These work for quick pilot holes in wood, but the impact action can cause the bit to wander or chatter. For anything requiring precision—hinge holes, dowel holes, or metal drilling—use a drill. A drill also gives you better feel for the bit’s progress.
Control and the clutch
Control separates a drill from an impact driver in many everyday tasks.
Drill clutch
A drill’s adjustable clutch is a ring near the chuck with numbers or symbols. Turning it sets the torque at which the clutch slips. This is invaluable for driving screws into soft materials, assembling furniture, or working with fine trim. You can set a low clutch number so the screw stops flush with the surface every time. Impact drivers do not have this kind of clutch.
Impact driver control
Impact drivers typically have a variable-speed trigger and sometimes a speed selector switch. You control depth by feathering the trigger and by feel. With practice, you can stop the screw at the right depth, but it takes more skill than a drill’s clutch. For delicate work like driving screws into MDF or particleboard, a drill is safer.
Bits and chucks
The chuck and bit system affects convenience and versatility.
Drill chuck
Most cordless drills have a keyless chuck that accepts round shanks up to 3/8 inch or 1/2 inch, depending on the chuck size. You tighten it by hand. This allows you to use any standard drill bit, hole saw, or screwdriver bit with a hex adapter. Changing bits is fast, but the chuck can loosen over time and may need occasional retightening.
Impact driver collet
An impact driver uses a spring-loaded collet that accepts only 1/4-inch hex shanks. To insert a bit, pull the collet forward, push the bit in, and release. Bits snap in and out instantly, with no tightening required. This is faster than a drill chuck for screwdriving tasks. However, you need hex-shank bits or adapters for drill bits. For a full comparison of drill types, see our drill comparisons page.
Noise and comfort
Impact drivers are noticeably louder than drills, and the noise matters for hearing protection and workshop comfort.
Noise levels
A drill produces a steady whine. An impact driver’s hammer mechanism creates a loud, repetitive rattle that is much louder, often loud enough that repeated exposure can damage hearing. Always wear hearing protection when using an impact driver. For general workshop safety, review our power tool safety gear guide.
Vibration and fatigue
Impact drivers produce more vibration than drills. The impacts transfer through the tool into your hand and arm. While the tool does the twisting work, the vibration can cause fatigue over many fasteners. Drills vibrate less but require you to supply more twisting force. For large projects like decking, many users prefer an impact driver because it reduces wrist strain despite the vibration.
Which to buy first
If you are starting your tool collection, the answer depends on your most common tasks.
Start with a drill
A cordless drill is the more versatile first tool. You can drill holes, drive screws with clutch control, and mix paint or mortar with a paddle attachment. For a homeowner who hangs shelves, assembles furniture, and does light repairs, a drill covers nearly every need. It is quieter, more precise, and accepts the widest range of accessories. Read our guide on how to choose a cordless drill for home use for selection tips.
Add an impact driver later
Once you take on larger projects—building a deck, installing fencing, or framing a wall—an impact driver becomes invaluable. Many manufacturers sell combo kits that include both tools, a charger, and batteries. A combo kit is often a better value than buying separately. You can find impact drivers as standalone tools or in kits.
Two-tool strategy
If you can afford both, you will use each for its strength. Keep a drill loaded with a drill bit for pilot holes, and an impact driver loaded with a driver bit for the screws. This saves time switching bits and gives you the right tool for each step. Many pros and serious DIYers own both.
FAQ
Can I use regular drill bits in an impact driver?
Only if the bits have a 1/4-inch hex shank. Standard round-shank drill bits will not fit the collet. You can buy hex-shank drill bits or use a hex-shank adapter, but the adapter adds wobble and reduces accuracy. For precision drilling, use a drill.
Do I need special bits for an impact driver?
Yes, for driving screws you should use impact-rated driver bits. These are made of tougher steel and have a groove that locks into the collet. Standard bits can break under the high torque and impact action. Impact-rated bits are widely available and worth the small extra cost.
Is an impact driver too powerful for small screws?
It can be. The high torque and impacts can easily strip screw heads or crack thin wood. If you must use an impact driver for small screws, use a light trigger pull and consider a speed selector set to low. For delicate work, a drill with a clutch is safer.
Should I wear earplugs with an impact driver?
Yes. The loud clicking noise from an impact driver can exceed safe levels, especially in an enclosed space or over a long session. Wear earplugs or earmuffs rated for noise reduction. Always follow the tool manual’s safety recommendations.
Choosing between a drill and an impact driver comes down to the work you do most. A drill handles holes and controlled screwdriving. An impact driver powers through long fasteners with less effort. For most homeowners, a good cordless drill is the essential first purchase, and an impact driver is a powerful addition for bigger projects. Whichever you choose, always wear eye protection, read the tool manual, and keep safety guards in place.
