Buying route

Start with the job, then choose the drill

A cordless drill is a battery platform, a machine function and a package. Buyers can avoid mismatches by answering those separately, rather than starting from a brand name or a single advertised number.

1. Describe the workpiece and bit

Write down the material, the kind of bit or driver tip you need, the largest intended hole, and how often the job repeats. A chuck's maximum opening tells you what bit shank it can hold; it does not establish the maximum hole a particular tool can make in wood, metal or masonry. Hole capacity depends on the tool, bit, material, technique and the manufacturer's stated limits. If the exact model page or manual does not give a capacity, treat it as unknown and check with the manufacturer rather than copying a neighbor's spec.

2. Decide whether hammer action is essential

An ordinary drill/driver covers drilling and screwdriving modes. A hammer drill adds a distinct hammer-drilling mode for work where that action is required. Those functions can sit in similar-looking bodies, so check the exact model's mode table. For example, DEWALT's shared DCD794/DCD799 manual lists drill and screwdriving modes for DCD794, while DCD799's list adds hammer drilling. Read the drill-versus-hammer-drill guide before treating the names as interchangeable.

3. Match the battery family and the box

If you own batteries already, identify the platform printed on the pack and confirm the drill manual lists it. Then distinguish a bare tool from a kit: battery, charger, case and other accessories are SKU-specific. The DCD794B page says battery and charger are sold separately and lists a belt hook; the related DCD794D1 listing is a different package. Never infer the included pack from a product photo or a similar model number. The battery and kit guide gives a short checklist.

4. Check fit at the worksite

Measure the full approach, not just the distance from the drill nose to its motor. A bit projects forward, a battery may extend below the handle, and a hand needs space to grip and control the tool. A manufacturer's “head length” is a useful dimension only on its own terms. Check the model's angle and bit clearance against the actual recess and keep enough room to use the tool as the manual requires.

5. Compare evidence rather than a headline score

For each exact SKU, compare mode, chuck, battery system, included package, and confirmed dimensions. Separate a manufacturer's output claim from an independently measured result; this preview does not conduct tests. Note what the evidence does not say. A missing capacity, runtime, torque conversion or weight basis should stay open, not become an invented advantage.

Use the finder to apply documented requirements, then read the full model page and manual. A match is a shortlist aid, not permission to exceed the product's operating limits.