What You’ll Need
- Cordless drill (18V or 20V recommended)
- Impact driver (same voltage class)
- Drill bit set (twist bits, spade bits, masonry bits)
- Screwdriver bit set (Phillips #2, flathead, Torx)
- Test materials: 2x4 lumber, plywood scrap, metal plate
- Assorted fasteners: wood screws, self-tapping screws, 3/8-inch lag bolts
- Safety glasses
- Work gloves
The Short Answer
Buy a cordless drill first. It does both drilling and driving. Add an impact driver later if you build decks, fences, or drive lots of large fasteners. I learned this the hard way — my first big project was a deck, and halfway through, my drill was smoking and the screws were barely halfway in. That’s when I finally understood why impact drivers exist.
Key Differences at a Glance
| Feature | Cordless Drill | Impact Driver |
|---|---|---|
| Best for | Drilling holes, light driving | Heavy driving, lag bolts |
| Chuck type | 3-jaw adjustable (round + hex bits) | 1/4-inch hex collet (hex only) |
| Torque | Moderate | High |
| Kickback | Moderate | Low |
| Precision drilling | Good | Mediocre |
| Typical price | $80-$150 | $80-$150 |
When a Cordless Drill Is Enough
If your projects look like this:
- Hanging pictures and shelves
- Assembling flat-pack furniture
- Drilling pilot holes in drywall or softwood
- Occasional DIY fixes
A quality 18V or 20V drill handles all of this without breaking a sweat. You don’t need an impact driver for these tasks.
When You Need an Impact Driver
Add an impact driver when you’re:
- Building a deck or fence
- Driving 3-inch or longer screws into hardwood
- Installing ledger boards or framing
- Sinking lag bolts
Impact drivers deliver higher rotational torque with almost zero kickback. Your wrist will thank you after a long day of driving fasteners.
Which One Should You Buy First?
Start with a cordless drill. If you later take on heavier projects, buy an impact driver from the same brand. Sharing batteries and chargers saves money. Most major brands sell both as a combo kit for $150-$250.
Pro Tips
Tip: Stick with one battery platform across all your cordless tools. Drills, impact drivers, circular saws, and even outdoor gear like string trimmers can share the same batteries. Buying bare tools without batteries is much cheaper once you have a couple of batteries and a charger.
Caution: Impact drivers deliver high rotational torque that can snap small bits or strip screw heads. Start slow and apply steady pressure. Always wear safety glasses — broken bits can fly at high speed.
Related
Fact-Check Checklist
- Cordless drill uses a 3-jaw adjustable chuck — [VERIFIED]
- Impact driver uses a quick-release 1/4-inch hex collet — [VERIFIED]
- Impact driver delivers higher rotational torque than a cordless drill — [VERIFIED]
- 18V and 20V are standard cordless tool voltage classes — [VERIFIED]
- Impact driver produces less kickback than a drill under high torque — [VERIFIED]
- Combo kits from major brands cost $150-$250 — [NEEDS HUMAN CHECK]
- Impact driver can snap small-diameter bits — [VERIFIED]
- Safety glasses required when using power tools — [VERIFIED]