Adrian Kingsley-Hughes/ZDNET If you’re looking to bulk up your home tool kit, consider this great deal from DeWalt: For $139, you can get a DeWalt 20V MAX cordless drill and impact driver set  — saving you 46% off the usual price on Amazon right now, and coming close to the lowest price we’ve ever seen it hit. DeWalt 20V MAX cordless drill and impact driver kit for $139 (save $120) Now, I can’t say that I’m much of a tool brand fanboy, but I’ve grown quite fond of DeWalt power tools. It’s a brand that delivers decent tools at fair prices. I’ve owned these exact same tools, and they’ve been heavily used and abused — to the point where both have now and then been used as hammers — and they’re still going strong.  The 20V system is powerful enough to tackle most jobs you’re likely to come across, yet the tool and batteries are light enough that you can wield them for a few hours without getting fatigued. Also:  I’ve tested hundreds of DIY gadgets.…