Which is better for drilling concrete?

The ATOMIC kit. Its DCD799 has a hammer mode; the DCK277D2 drill has none and is not made for concrete or brick.

Is the ATOMIC kit worth the extra money?

If you need a hammer drill or a jigsaw, yes. At $140.00 at eBay versus $71.49 for the DCK277D2 as of November 4, 2026, you pay about double for a third tool and a bigger battery.

Which has better batteries?

The ATOMIC kit, with a 5.0 Ah and a 2.0 Ah pack. The DCK277D2 ships two DCB207 batteries, and some buyers say theirs did not match the listing.

Which is lighter to use overhead?

The DCK277D2 impact driver at 2.0 lbs. The ATOMIC drill body is listed at 2.4 lbs.

Do both kits include a charger and bag?

Yes. Both include a charger and a contractor bag, and both have brushless motors and variable speed triggers.

Which is easier to find in stock?

The DCK277D2. Four stores price it new versus two for the ATOMIC kit as of November 4, 2026.

DEWALT 20V MAX Cordless Drill, Impact Driver, 2-Tool Power Tool Combo Kit, Brushless Power Tool Set with 2 Batteries and Charger Included (DCK277D2) vs DeWalt ATOMIC 20-Volt Lithium-Ion Cordless 2-Tool Combo Kit

Buy the DCK277D2 if you want the lowest-cost path into DeWalt 20V drilling and driving; it is $71.49 at eBay as of November 4, 2026. Buy the ATOMIC kit if you need a hammer drill for masonry or a jigsaw, and accept the higher price of $140.00 at eBay as of November 4, 2026. The ATOMIC kit is the more capable set; the DCK277D2 is the cheaper one and covers most drilling and driving.

Today the DEWALT 20V MAX Cordless Drill, Impact Driver, 2-Tool Power Tool Combo Kit, Brushless Power Tool Set with 2 Batteries and Charger Included (DCK277D2) costs $227.51 less at its best price.

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