DEWALT 20V MAX XR Brushless Impact Driver and Hammer Drill Combo Kit with 4.0Ah Battery, 2 Heavy Duty Walkie Talkies (DCK299M2 & DXFRS800) - Perfect for Construction, Renovation, and DIY Projects

I upgraded from an old DeWalt 18V combo set, and it was worth every penny.When compared to a brushed motor, brushless has more power. Less energy is wasted as friction (heat) since the rotor and stator have an air gap between them. A brushed design has brushes that make contact as the rotor spins. That generates friction, heat, and they eventually wear out and need to be replaced. Brushless motors are more complex and expensive but do away with that, generating more power output at the rotor for the same power input.In addition, brushless motors tend to be smaller. This means the drill and impact driver are both smaller than my old ones, and this is critical for the drill.I am a big fan of Irwin Speedbor drill bits - specifically the three-bladed bits with flutes and the screw nose. That pulls the bit through wood, making it quick and easy to drill holes at least until you get to the back edge. Anyway, drilling holes through joists or studs to pull wire where the framing is already fully installed can be difficult or impossible without a right-angle drill: the drill and bit can be wider than the stud/joist cavity (14.5"). However, a 4" Speedbor bit in this drill (shorter because brushless) easily fits in a standard stud cavity with plenty of room to spare. I no longer need to beg borrow or steal a right-angle drill.The impact driver is an impact driver. Nothing special to report on that, just that it does its job as one would expect. Same with the charger.I like that this kit comes with a 4AH battery. Many of DeWalt's kits come with wimpy 2AH batteries. Those will not last as long - half as long, to be precise. Better to have the extra longevity to get the job done without swapping batteries in the middle.This may be more expensive than the non-MAX variety, but it is worth every penny and I regret nothing. Go big or go home!Update: After a year and a half of use and abuse, these tools are still going strong. They may be nicked up and dinged up, but they just work and work well. Since buying into this battery system I have bought a few other tools and I am even more grateful for the 4AH battery. I use it for the orbital sander and the extra runtime over a smaller battery is nice. I also bought a 6AH battery. Swapping between them when sanding bigger projects works well and I never run out of juice, thanks to the rapid charger in this kit.As far as I am concerned there are two power tool systems worth buying: DeWalt 20V Max, and Milwaukee Fuel. You spend a little extra money up front, but you also don't need to replace a broken tool a few months later which is actually more expensive in the long run.