Does the 720 have metal or plastic drive gears inside?
The Dewalt DC720KA does use metal drive gears.

The DeWalt 18 volt 1/2'' cordless compact drill / driver is extremely durable and efficient. This amazing tool features a lightweight design (4.8 lbs.) Which minimizes user fatigue. Making these even more versatile is the compact size which allows users to fit into tight spaces.
Features:
Specifications:
DEWALT is firmly committed to being the best in the business, and this commitment to being number one extends to everything they do, from product design and engineering to manufacturing and service.
This product is listed under the following manufacturer number(s):
*Denotes a finish or option that has been discontinued
The Dewalt DC720KA does use metal drive gears.
| Speed Settings | 2 |
|---|---|
| Voltage | 18 |
| UL Listed | Yes |
| Chuck Size | 1/2" |
| Number of Batteries | 2 |
| Chuck Type | Keyless |
| Application | Power Tools |
| Product Weight | 5 |
| Charger Included | Yes |
| Tool Weight | 4.8 |
| No Load RPM | 1700 |
| Charge Time | 1 Hour |
| Manufacturer Warranty | 90 Day Money Back Guarantee |
| Power Type | Cordless |
| Cordless | Yes |
| Battery Amp Hour | 3 |
| Battery Type | NiCd |
| Includes Carrying Case | Yes |
| Clutch Settings | 17 |
| Lighting | Yes |
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