Needed a bit AF fine tune which is rare for Z lenses, but once dialed in it works well.
DEWALT-D25323K 1 In. L-Shaped Rotary Hammer with Shocks, FREE SHIPPING
Dec 05, 2017
Once you use it, you will never go back to regular hammer drills
If you do more than occasional drilling in cement, concrete blocks, or hard bricks, a rotary hammer drill will not only save you significant time, but also your elbows. The D25323 and its cousin with interchangeable chuck the D25324 have good vibration reduction to reduce the wear and tear on your elbows since hammer drills cause rapid back-and-forth motions that your elbows end up absorbing. I had severe tendonitis in the elbows after 2 weeks of drilling in cinder blocks. I wished I would have bought the rotary hammer drill long ago. Couple with the fact that these drills eat through concrete so fast, the amount of time you're handing it is much reduced, further lessening chance of repetitive injury. I've been very satisfied with the D25323: the speed at which it drills is absolutely incredible, easily an order of magnitude faster than a regular hammer drill. It also generates less dust than regular hammer drill since it doesn't spin as fast. The hole dimensions are more accurate -- maybe this is due to less wobble on the chuck. The drill is not light at 7.5lbs, but not so heavy as to tire you. I use the D25300DH dust collector attachment which saves time from having to vacuum up the dust. It's a completely self-contained unit, so no external shop vac and hose needed. For those who have many standard shank masonry bits around, buy the $40 Bosch SDS+ 3-jaw KEY (not keyless) check adapter. Unless you do massive demolition or need to use very large core bits, I don't think you need anything bigger than the D25323. The weight of the bigger drills will take a toll on you.