As an HVAC technician, I recently upgraded from the DCF887 to the new DCF870, and I couldn’t be happier. This impact driver is much quieter, and the hydraulic mechanism greatly reduces vibration, making it easy on the wrist even during long installation jobs.
One thing I immediately noticed is that the wobbling issue I had with the 887 model is almost completely gone. The bit feels solid and stable, which gives me more control and accuracy.
The compact head design is another huge advantage—it fits perfectly into tight spaces where standard impact drivers just can’t go.
Overall, it’s a powerful yet smooth tool that’s ideal for HVAC or any trade work that requires precision in confined areas. Highly recommended.

Quiet and powerful. For those that are Delwalt users, this is driver to get. To be fair, here at the end of 2025, the DCF860 is still the king of the driver's, but the DCF870 gets it done. I will take a little less power for the much lower volume when drivinf fasteners. I ran 2-1/2" #9 deck screws in and had to watch that i wasn't overdriving them. I stepped up to the 5-1/8" and its dropped them like a rock.

The grip is comfortable as most Dewalts are today. No Hotspots with barehands. It feels solid but I haven't dropped it out of 2nd story window. The compact head will be great for working between studs.

But the headline is how quiet it is. With predrilled holes i didnt even hear impacting until I got to the bigger fasteners. Granted this was all white pine. But when driving the aforementioned 5" mini lags, it was quieter than my 12V driving 2" #8's. When i put up plywood sheeting in my garage, everyone for half a block knew it using my old 887. If I'd have had the 870, no one would've had a clue. Its unquestionably by favorite impact these days. Now Dewalt how bout a fluid impact in a lower power form factor for furniture, trim work, and the like.