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An impact driver can remove a small screw in a second—and strip its head just as quickly. Its rapid hammering action is built for driving fasteners, not delicate control. You can still use one on small screws, but the bit, speed setting, and way you apply pressure matter more than raw power.
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When to use an impact driver
For cabinet hardware, small hinges, electronics, and other screws roughly 3 mm (⅛ inch) or smaller, a cordless drill or hand screwdriver is usually the safer choice. A drill gives you a smooth, controllable rotation, and many have a clutch that slips when resistance reaches a set level. An impact driver typically has no comparable clutch; its blows can keep tightening a screw after you think it is seated.
An impact driver makes more sense when you are driving a small screw into dense wood, working with a long screw, or fastening many screws and need the compact tool’s power. Start in drill mode if you have a compatible drill, then switch tools only if the screw stalls. If buying one tool for general household work, a cordless drill with an adjustable clutch is the more forgiving choice for small fasteners.
Choose the right bit
A bit that does not fit tightly is a common cause of damaged screw heads. Use the exact drive type and size: a Phillips #1 bit for a #1 screw, for example, rather than a #2 bit that seems close. For square, Torx, or hex drives, match the size stamped on the screw or packaging. The bit should sit fully in the recess with little side-to-side movement.
Use a short, sharp bit where possible. A worn tip slips more easily, and long extensions can flex or wobble. Impact-rated bits are made to withstand the driver’s repeated blows; ordinary bits may snap sooner under impact. A small impact-rated bit set with small sizes is useful if you regularly use an impact driver, though a basic quality set is fine for occasional work.
Set speed and mode
If your driver has multiple speed settings or assist modes, choose its lowest setting or a mode intended for small fasteners. Some models have electronics that slow the tool or stop it near the end of a screw’s travel; check the manual because mode names and behavior vary. These controls help, but they do not replace careful trigger use.
If the driver has only a variable-speed trigger, keep your finger on it lightly and use brief pulses. Practice on scrap wood with a matching screw before working on the actual piece. A low setting may still deliver enough force to bury a small screw, especially in softwood. Avoid holding the trigger down to “let the tool finish” when the head is close to the surface.
Drive with control
Mark the screw location and, for wood near an edge or a small-diameter screw, drill a pilot hole. The pilot should be narrower than the screw’s solid core; the screw manufacturer’s chart is more reliable than a single rule because wood species and screw designs differ. In hardwood, a pilot hole can reduce splitting and the torque needed to drive the screw. In softwood, a pilot may be unnecessary for a short screw well away from an edge.
Seat the bit squarely in the screw head. Hold the driver in line with the screw, press firmly enough to keep the bit engaged, and start with a quick, gentle trigger pull. Stop when the head is nearly seated. Finish by hand, or use a drill with its clutch set low. If you must finish with the impact driver, use short taps and stop as soon as the head reaches the surface.
Do not lean hard enough to bow the screw or push the bit out of alignment. If the bit begins to cam out, stop immediately. Continuing usually rounds the recess. Back the screw out while the head is still usable, check for the correct bit size, and clear chips or debris from the hole.
Choosing a tool for small screws
| Tool | Control | Best use | Main trade-off |
|---|---|---|---|
| Hand screwdriver | High | Very small screws and final tightening | Slow for many screws |
| Cordless drill with clutch | High when set correctly | General fastening and repeatable depth | Can still strip a screw if the clutch is too high |
| Impact driver | Lower on tiny fasteners | Longer screws, dense wood, repeated driving | Easy to overdrive or damage a small screw |
Recognize the warning signs
A screw that turns without advancing may have stripped its threads or lost its bite in an oversized hole. Stop rather than driving harder. For wood, a longer screw or a properly sized repair may help; for a loose screw in a wall anchor, use an anchor suited to the wall material and screw size instead of forcing the fastener. A spinning screw head usually means the recess is damaged, while a broken screw often points to excessive torque, a binding hole, or a fastener unsuited to the material.
Keep your other hand away from the bit and screw head, and wear eye protection: a bit tip can break, and small fasteners can fly. If the workpiece is thin or easy to mark, clamp it and test the setup on scrap first. For a handful of small screws, a screwdriver or clutch-equipped drill is often cheaper in time and in damaged hardware than trying to make an impact driver behave like a precision tool.