Power Tools — FAQ
Can I use these drill drivers for concrete drilling?
None include hammer function. For occasional concrete use, buy a separate SDS rotary hammer. For light masonry, use carbide-tipped bits at low speed with frequent breaks to prevent motor damage.
What's the real difference between brushless and brushed motors?
Brushless motors use electronic controllers instead of physical brushes, eliminating friction and wear. They run cooler, last longer, and adapt power output to the task. Brushed motors are proven, cheaper, and easier to repair but require brush replacement every 200-300 hours.
Are all 20V batteries interchangeable between brands?
No. Battery platforms are proprietary. DEWALT 20V MAX only fits DEWALT tools. Milwaukee M18 only fits Milwaukee. Attempting to modify batteries for cross-brand use voids warranties and creates fire hazards.
How much torque do I need for building a deck?
Minimum 350 in-lbs for 2-1/2-inch deck screws into pressure-treated lumber. For 3-inch lag bolts, step up to 500 in-lbs. The Milwaukee M18 or DEWALT DCD771C2 handle deck building without strain.
Is a 3/8-inch chuck big enough for most tasks?
Yes for 90% of homeowners. It accepts bits up to 3/8-inch shank, covering screws up to #14 and drill bits up to 1-inch spade bits. For hole saws larger than 2 inches or auger bits, upgrade to 1/2-inch chuck.
Why are all these drill drivers so far under $500?
The $500 threshold covers pro-grade brushless models with 5.0Ah batteries. These picks represent the sweet spot: reliable performance for serious DIY and light commercial work without paying for features hobbyists won't use.
