StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Compare

DeWalt DCD799B Atomic Hammer Drill vs DeWalt DCD805D2 Hammer Drill Kit

The DCD805D2 kit is the better buy for most shoppers. It includes two batteries, a charger and a bag, so it works out of the box, and it has a faster 2,000 rpm top speed and a metal ratcheting chuck. The DCD799B is the shorter, lighter bare tool, and its 552 UWO and 28,050 BPM suit tight-space masonry work. Owners of the XR line praise its power and chuck grip; the Atomic is liked for its size, but as a bare tool it needs batteries and a charger you may not own.

  • Choose the DCD799B if you already own 20V MAX batteries and want the shortest, lightest hammer drill for tight spaces and overhead masonry.
  • Choose the DCD805D2 if you want a complete kit with two batteries, a charger and a bag, plus a faster top speed and a metal ratcheting chuck.

Prices

  • DeWalt DCD799B Atomic Hammer Drill: $79.90 at Walmart (last seen Nov 11)
  • DeWalt DCD805D2 Hammer Drill Kit: $100.00 at Tool Pass Pro (checked today)
  • Difference: the DeWalt DCD799B Atomic Hammer Drill is $20.10 cheaper than the DeWalt DCD805D2 Hammer Drill Kit at the latest prices (Nov 11 and Nov 13)
DEWALT
DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY

DeWalt DCD799B Atomic Hammer Drill

DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY

4.1(8 ratings)
$79.90at WalmartChecked Nov 11
See all prices and details
Visit Walmart
Pros
  • Shortest 20V MAX hammer drill, good for tight and overhead work
  • Light at 2.8 lb bare
  • Brushless motor with 552 UWO and 28,050 BPM
  • LED light for dark spaces
Cons
  • No battery or charger included
  • Single speed range and lower top rpm
  • Keyless chuck holds less firmly than a ratcheting chuck
  • No kit bag
DeWalt
DeWalt DCD805D2 20V Max XR Brushless Cordless 1/2" Hammer Drill/Driver Kit

DeWalt DCD805D2 Hammer Drill Kit

DeWalt DCD805D2 20V Max XR Brushless Cordless 1/2" Hammer Drill/Driver Kit

5(16 ratings)
$100.00at Tool Pass ProChecked 36 min ago
See all prices and details
Visit Tool Pass Pro
Pros
  • Complete kit: two batteries, charger, bag
  • Two speeds up to 2,000 rpm
  • Metal ratcheting chuck grips bits well
  • Three-mode LED with spotlight mode
Cons
  • Longer and heavier than the Atomic
  • Only 2Ah batteries in the kit
  • Bulkier in very tight spaces

What separates them

DeWalt DCD799B Atomic Hammer DrillDeWalt DCD805D2 Hammer Drill Kit
What's in the boxBare tool only; battery and charger sold separatelyTwo 2Ah batteries, charger, kit bag and belt hook
Top speed0-1,650 rpm, single rangeTwo speeds, 0-650 and 0-2,000 rpm
Chuck1/2 in. keyless1/2 in. metal ratcheting chuck with high bit retention
Size and weightDeWalt's shortest 20V MAX hammer drill, 2.8 lb bareCompact but larger than the Atomic
Work lightSingle on-tool LED3-position, 3-mode LED up to 70 lumens with 20-minute spotlight mode
Masonry performance552 UWO and 0-28,050 BPMBrushless XR motor tuned for drilling and fastening
Battery platform20V MAX, tool only20V MAX, two batteries included

Price history

$249.99$75.00
Nov 1Nov 13
  • DeWalt DCD799B Atomic Hammer Drill: lowest $75.00 on Nov 1 at Amazon; $79.90 on Nov 12.
  • DeWalt DCD805D2 Hammer Drill Kit: lowest $249.99 on Nov 13 at eBay.

Prices at every store

DeWalt DCD799B Atomic Hammer Drill

  • WalmartNew

    In stockSold by Nalusneakers LLCReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $79.90Free shippingChecked Nov 11
    Visit Walmart
  • Home DepotNew

    In stock

    $143.02Free shippingChecked Nov 11
    Visit Home Depot
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $79.90Free shippingChecked Nov 11
    Visit Amazon
  • eBayNew

    Availability unknownSold by ahgroup941 (100% positive, 8 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $92.00+ $10.07 shippingChecked Nov 8
    Visit eBay

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay
  • Tool NutCheck price at Tool Nut

Store links may earn us a commission.

All 17 stores and price history →

DeWalt DCD805D2 Hammer Drill Kit

  • Tool Pass ProNew

    In stockReturn policy

    $100.00Checked 36 min ago
    Visit Tool Pass Pro
  • eBayNew

    In stockSold by montalegroup

    $249.99Free shippingChecked 37 min ago
    Visit eBay
  • Busy BeaverNew

    In stock

    $288.88Checked 37 min ago
    Visit Busy Beaver
  • AF SupplyNew

    In stock

    $284.69+ $14.95 shippingChecked 37 min ago
    Visit AF Supply

Also available at

  • Authorized Tool OutletCheck price at Authorized Tool Outlet
  • ToolupCheck price at Toolup
All 15 stores and price history →

Specs compared

SpecDeWalt DCD799B Atomic Hammer DrillDeWalt DCD805D2 Hammer Drill Kit
Chuck size1/2 in1/2 in.
Battery Capacity2.0Ah2Ah
Battery TypeLithium IonLithium Ion
Motor TypeBrushlessBrushless
Power SourceBatteryBattery
Voltage20 volts20V
colorBrown—
size1—
BrandDEWALT—
Power typeBattery—
Volts20 Volts—
Maximum speed1650 rpm—
Show all 40 specsShow fewer specs
SpecDeWalt DCD799B Atomic Hammer DrillDeWalt DCD805D2 Hammer Drill Kit
Charger includedN—
Electric motor typeBrushless—
AccessoriesBattery Charger—
ModelDCD799B—
Assembled product weight2.8 lb—
Has written warrantyNo—
Watts360 Watts—
Amps3 A—
Tool TypeHammer Drill—
Power Voltage

What reviewers say

DeWalt DCD799B Atomic Hammer Drill

Owners of the Atomic line generally rate the compact DeWalt drills well for size and power in tight spots. The main complaints are about buying bare tools and about hammer performance on hard concrete.

What people mention
  • SizePraisedOwners like how short the body is for work between studs and in cabinets.
  • PowerPraisedThe brushless motor is seen as strong for a drill this small.
  • Hammer modeMixedIt handles brick and block but bogs down in hard concrete.
  • BatteryMixedBare-tool buyers must supply their own pack, and small packs run out fast.

DeWalt DCD805D2 Hammer Drill Kit

  • 5 / 516 ratings

Ratings are high, and owners describe it as a solid, well-balanced compact hammer drill that handles everyday jobsite work. The most common note is that the included 2Ah batteries run down quickly under heavy load.

What people mention
  • Battery runtimeMixedOwners say the 2Ah packs are fine for light work but run down quickly under continuous heavy drilling.
  • ChuckPraisedThe metal ratcheting chuck is described as gripping bits firmly with little slip.
  • Size and balancePraisedReviewers like the compact body and balanced feel, especially in tight spaces.

Questions and answers

Which is better for drilling masonry in tight spots?
The DCD799B is shorter and lighter, so it fits where the DCD805D2 will not. Both are brushless 20V hammer drills; the Atomic's 28,050 BPM handles small anchors and brick.
Do I need to buy batteries for the DCD799B?
Yes. It is a bare tool, so you need a 20V MAX battery and charger. If you own none, the DCD805D2 kit covers both.
Which has more power?
The DCD805D2 reaches 2,000 rpm against 1,650 rpm, which helps with fast drilling and driving. The DCD799B lists 552 UWO, strong for its size.
Which chuck holds bits better?
The DCD805D2's metal ratcheting chuck grips bits more firmly than the DCD799B's keyless chuck, which matters with large bits and heavy torque.
Is the DCD805D2 worth stepping up to?
If you have no 20V batteries, yes: the kit makes it usable immediately and adds a faster top speed and better chuck. If you already own batteries and want the smallest tool, the DCD799B is enough.
Which lasts longer?
Both use brushless motors. The DCD805D2's metal ratcheting chuck and XR build are aimed at heavier daily use; the DCD799B is built for compact work.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

More comparisons

  • Dewalt 20V Max XR Cordless Hammer Drill (DCD1007) vs DeWalt DCD805D2 20V Max XR Brushless Cordless 1/2" Hammer Drill/Driver Kit
  • Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only) vs DeWalt DCD805D2 20V Max XR Brushless Cordless 1/2" Hammer Drill/Driver Kit
  • DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY vs Dewalt 20V Max XR Cordless Hammer Drill (DCD1007)
  • Dewalt DCD805B 20V Compact Cordless 1/2" Brushless Hammer Drill (Tool Only) vs DeWalt DCD799B 20-Volt MAX Atomic Cordless Compact Hammer Drill, 1/2 In., TOOL ONLY

Buying guides that pick them

  • Best DeWalt power tools
  • Best DeWalt hammer drills
20V
—
Amperage4 Amps—
Chuck TypeKeyless—
Battery Voltage20V—
Battery IncludedNo—
Number Of Batteries Included1 (with kit)—
Max Speed1650 RPM—
Torque552 UWO—
Impact Rate0-28050 BPM—
Capacity1/2 in (maximum solid bit)—
Included AccessoriesBelt Hook—
Height7.97 in.—
Length6.5 in. (tool head)—
Weight2.53 lbs.—
Width2.49 in.—
Functionality HighlightsHammer function—
Number Of Speed Settings2—
Built In FeaturesLED work light—
Impact FunctionYes—
  • LED lightPraisedThe adjustable three-position light and spotlight mode are called useful in dark work areas.