How to Use an Impact Driver? | Drive Screws With Control

An impact driver works by applying rapid rotational impacts to drive and remove fasteners with high torque and minimal cam-out.

An impact driver is the tool you reach for when a screw won’t budge or when you’re driving long fasteners into dense material. Unlike a drill, it delivers sudden rotational bursts — impacts — that transfer tremendous turning force to the fastener while reducing the chance of stripping the head. Using one properly isn’t complicated: it takes the right bit, steady pressure, and a lighter trigger finger than you might expect.

Get The Bit And Collet Ready

Impact drivers use a 1/4-inch hex quick-connect chuck, not the three-jaw drill chuck you see on a drill/driver. This means you push a bit in until it clicks, and pulling the collar forward releases it.

Before anything else, disconnect power or remove the battery when changing bits. The tool can engage accidentally, and the sudden torque is no joke.

Driving Screws: Slow Start, Steady Pressure

The core technique for driving a screw is straightforward: seat the bit, start slow, and keep the tool perpendicular to the surface.

Insert an impact-rated bit — standard bits can shatter or strip under the hammering action — then set the direction switch to forward. Place the bit squarely in the screw head, grip the insulated handle firmly, and pull the trigger lightly. The key is to start slowly or use short trigger bursts. The impact action does the work; you don’t need to push hard or floor the trigger.

Apply steady downward pressure so the bit stays engaged with the screw, and maintain the tool perpendicular to the work surface to avoid stripping the head. Stop when the screw head is flush with the material. Overdriving past this point strips the screw, damages the material, or breaks the fastener.

If you’re driving multiple screws, the speed you gain from impacts matters less than consistent control. Set the depth with your finger on the trigger, and you’ll develop a feel for when the screw seats.

Removing Stuck Fasteners

For removal, flip the direction switch to reverse. Seat the bit, maintain downward pressure to prevent cam-out — the bit slipping out of the fastener head — and use the impact action to break the screw free. The rapid impacts often loosen a rusted or over-torqued fastener that a plain drill would simply strip.

For screws that are especially stubborn, a preliminary shot of penetrating oil or a different tool may be necessary. The impact driver’s action is powerful, but it can’t overcome a fastener that’s seized solid.

What Impact Drivers Are — And Aren’t — For

Impact drivers excel at driving and removing fasteners. They are not precision drilling tools. If your job involves drilling clean holes, a standard drill/driver is the appropriate tool. For driving deck screws, lag bolts, or removing lug nuts, the impact driver is faster and more controlled.

Here’s a quick look at what different models offer, so you know what to expect from the tool class:

Cordless models dominate the market, but corded impact drivers like the Makita 6952 still offer consistent power without battery anxiety. Typical cordless consumer models run on 12V to 20V platforms, with higher voltage generally meaning more torque.

When you’re shopping for the right tool for automotive work, our tested roundup of the best impact driver for lug nuts breaks down which models deliver the torque and control you need.

Safety matters: keep both hands on the tool — one on the insulated grip, one bracing if needed — and maintain a firm stance. The impact force can surprise you. Wear a respirator when driving into materials that produce dust, and always disconnect power before changing bits.

FAQs

Can I use a regular drill bit in an impact driver?

No. Impact drivers use 1/4-inch hex bits, not round drill bits. You can buy hex-shank drill bits, but the impact action can damage standard drill bits. For drilling holes, a drill/driver is the better tool.

Why does my impact driver keep stripping screws?

You’re likely using too much trigger force, or the bit isn’t seated squarely in the screw head. Start slowly with short bursts, keep the tool perpendicular, and use a sharp impact-rated bit that fits snugly.

Is an impact driver worth it if I already have a drill?

If you drive many screws or remove stuck fasteners, yes. The impact action delivers more torque with less cam-out and less wrist strain. For occasional shelf-hanging, a drill is enough.