Drill vs impact driver: which do you need?
Updated June 2026Independently researchedNo paid placement.
If you can only buy one tool, an impact driver is often the more versatile choice for driving screws and fasteners, but you’ll still need a drill for drilling clean holes. Serious DIYers and pros nearly always own both because each tool excels at tasks the other struggles with.
How a drill and an impact driver work differently
A standard drill simply rotates its chuck, that’s it. The motor spins a gear train, which turns the bit, and you control speed and torque with the trigger. For drilling holes, that smooth, steady rotation is ideal because it keeps the bit centered and prevents tear-out. An impact driver adds a mechanical hammering action. Inside, a spring-loaded mechanism strikes the anvil rotationally, thousands of tiny, rapid blows per minute, while the bit spins. This “rotary hammer” effect delivers sudden bursts of torque that help drive screws through tough materials without the cam-out (slipping) that plagues drills. The trade-off is much less control for precision work.
What each tool is good at (and bad at)
A drill is your go-to for boring holes in wood, plastic, metal, and even masonry (with a hammer-drill setting). It offers fine control for tasks like driving small screws into cabinet hinges or assembling furniture where you need a gentle touch. But when you try to drive a three-inch deck screw into dense lumber with a drill, you’ll fight cam-out, wrist-twisting, and a slow, struggling motor. An impact driver chews through those long screws effortlessly. Its hammering action overcomes resistance without needing you to push hard, so screws seat flush every time. However, use an impact driver to drill a clean hole in hardwood, and you’ll likely get a rough, oversized bore because the percussive force throws the bit off-center. It’s also louder and can buzz your hand numb during extended use.
Why bit compatibility matters: 3-jaw chuck vs 1/4-inch hex
A drill uses a three-jaw chuck that can grip any round-shank bit, standard twist drills, spade bits, hole saws, and Forstner bits. You can tighten it by hand or with a key, and it accommodates a wide range of diameters. This makes the drill the universal hole-maker. An impact driver uses a spring-loaded collet that accepts only bits with a 1/4-inch hex shank. That includes most screwdriver bits (Phillips, square, Torx) and a growing array of hex-shank drill bits, but you’ll need an adapter to use standard round-shank bits. The adapter adds wobble and length, which reduces accuracy and reach. For serious drilling, you still want a drill’s chuck.
Should you buy only one? The most common mistake
The biggest mistake new buyers make is buying only a drill and then trying to drive long deck screws or lag bolts with it. The drill’s motor strains, the bit slips out of the screw head (cam-out), and the battery drains fast. Frustration sets in, and they either buy an impact driver anyway or return the drill. If your work is mostly drilling holes, hanging pictures, simple repairs, assembling flat-pack furniture, a drill alone is fine. If you’re building a deck, installing drywall, or driving lots of fasteners, an impact driver will save you time and effort. For occasional mixed use, consider a brushless drill with a high-torque setting; it can handle moderate driving. But for heavy driving, nothing beats an impact driver.
Do you need both? How to decide if a combo kit is right
Most serious DIYers and pros own both because the two tools complement each other. You drill pilot holes with the drill, then switch to the impact driver to drive screws, no bit swaps, no frustration. Spending a few hundred dollars on a combo kit that includes a drill and an impact driver with two batteries and a charger is often the most economical path. If you’re starting from scratch and can afford only one, buy the tool that matches your most frequent task. If you’re still unsure, a combo kit removes the guesswork and gives you the best of both worlds without buying duplicates later. Many kits are priced barely more than a single high-end tool, making them a smart long-term investment.
Frequently asked questions
Can I use regular drill bits in an impact driver?
Yes, but only if the bits have a 1/4-inch hex shank or you use a hex-shank adapter. An adapter adds length and wobble, so for precision drilling, a standard drill is still better.
Is an impact driver too powerful for small screws?
Not if you use the trigger control and a light touch. Many modern impact drivers have variable speed and even a “self-tapping” mode that reduces power at the end to avoid overtightening. Practice on scrap first.
Which tool is better for drilling into concrete?
Neither a standard drill nor an impact driver is ideal. You need a hammer drill (which adds a forward hammering action) or a rotary hammer for masonry. An impact driver can drive concrete anchors but won’t drill clean holes in concrete.
What is cam-out and why does an impact driver reduce it?
Cam-out happens when the screwdriver bit slips out of the screw head because the drill’s steady torque tries to twist the bit sideways. An impact driver’s rapid rotational hammering delivers torque in short bursts, keeping the bit engaged in the recess and preventing slipping.
Should I buy a drill or an impact driver for general home use?
If you mostly drill holes (for anchors, hinges, small projects), get a drill. If you assemble furniture, hang shelves, or do any kind of driving, an impact driver will serve you better. Many homeowners find a combo kit the safest bet.