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  3. How to Choose a Cordless Drill
Tools

How to Choose a Cordless Drill: Voltage, Torque and Features

How to choose a cordless drill or drill/driver: voltage, brushless motors, torque, chuck size, impact drivers vs drills, batteries and kits for home projects.

Quick answer

For most home projects, a 12V or 18/20V brushless drill/driver with two batteries is the best buy. 12V tools are lighter and great for furniture assembly and small repairs; 18/20V tools have more power for drilling into wood, masonry and driving long screws. Add an impact driver if you drive a lot of screws. Choosing one battery platform lets you add more tools later.

A cordless drill is the first power tool most people buy. Here is how to choose one.

Voltage

Voltage Best for
12V Furniture assembly, hanging pictures, small repairs; compact and light
18V / 20V max General DIY, drilling into wood and masonry, larger screws

(18V and 20V max describe the same class of battery.)

Drill/driver vs hammer drill vs impact driver

  • Drill/driver: drills holes and drives screws. Has a clutch to set torque.
  • Hammer drill: adds a hammering action for brick and concrete.
  • Impact driver: drives screws and bolts with high torque; uses hex bits.

Features to compare

  • Brushless motor: more runtime and efficiency.
  • Torque and speed settings: two-speed gearboxes cover drilling and driving.
  • Chuck size: 1/2 inch takes larger bits; 3/8 inch on compact drills.
  • LED light and a comfortable grip.
  • Weight with the battery attached.

Batteries

  • Kits with two batteries avoid downtime.
  • Higher amp-hour (Ah) batteries run longer but weigh more.
  • Pick a battery platform with the other tools you’ll want (saws, sanders, lights).

Starter kit checklist

  • Drill/driver (and impact driver if you’ll drive many screws)
  • Two batteries and a charger
  • Drill bit set (wood, metal, masonry)
  • Driver bit set with hex shanks
  • Safety glasses

Common questions

What's the difference between a drill and an impact driver?

A drill/driver drills holes and drives screws with a clutch to prevent overdriving. An impact driver adds rotational blows for driving long screws and lag bolts with less effort, using hex-shank bits.

Is brushless worth it?

Usually, yes. Brushless motors are more efficient, run cooler and get more work from each battery charge.

12V or 20V drill?

12V for light-duty work and tight spaces; 18/20V for heavier drilling and frequent DIY projects. Many homeowners own both.