I learned some things testing this rotary hammer drill. I never heard of an SDS-plus drill bit shank. According to wiki the name comes from the German: Stecken – Drehen – Sichern ("Insert – Twist – Secure"). I guess I need to get to the tool store more.Anyway, it's great for quick bit changes because according to wiki "The drill bit is not held solidly in the chuck, but can slide back and forth like a piston; it does not slip during rotation due to the non-circular shank cross-section, matching the chuck. The hammer of the drill acts to accelerate only the drill bit itself, and not the large mass of the chuck, which makes hammer drilling with an SDS+ shank drill bit much more productive than with other types of shank." End of lesson. Oh, wait, there’s another lesson incoming.I can't use this drill with my existing straight shank drill bits, but for $12 I got a 3/8" keyless chuck that fits in the included magnetic SDS->Hex shank adapter so I can now use all my drill bits with the unit. The SDS-> Hex adapter is for screwdriver tips, which makes sense so you can screw something in where you've just drilled a hole. Since the SDS is quick-change this allows you to quickly change from a SDS masonry bit to a screwdriver bit in seconds. Very nice! (However, there’s a lesson here… to be explained shortly. If you know the lesson, you’re probably already shaking your head at me.)Note: the hex chuck I purchased for use with wood and metal bits is held in magnetically.While I can use this unit as a regular drill for wood and metal, it's a hammer drill, hence the SDS+ shank.I have a corded DeWalt hammer drill that I've used a lot to drill into brick that contains small aggregate rocks. It works great.I compared drilling through a piece of 1.5" concrete (see pic) using the same bit in the DeWalt and the Einhell. The Einhell was the clear winner.The Einhell also works great as a wood / metal drill with the magnetic hex chuck I purchased.However – insert lesson here – the Einhell clearly has a LOT of hammer action. Let’s try hammer mode. Since the chuck I was using is only held in with a magnet, it shot the chuck/bit out of the SDS->Hex adapter the second I turned it on in hammer mode. (Lesson learned.) When you're using the Einhell as a hammer drill make sure you use an SDS bit and not a bit with a magnetic adapter. LOL. SDS bits ordered and received. (Lesson applied.)The Einhell has a LOT more hammer action than my corded DeWalt DW511 hammer drill. The 4.3 lb 1/2" max bit DeWalt has 0-46000 BPM and 0-2700RPM. The 4.9 lb (w/o battery) 3/4" max bit Einhell has 0-5500 BPM (blows/min) and 0-1200RPM. Don't let the 5500 BPM number fool you.The SDS hammer action is intense. It's really not fair to compare the two drills, as clearly the DeWalt is more of a drill than a hammer drill.The DeWalt works great as a hammer drill, but the Einhell is a BEAST of a hammer drill and cordless!With the 2 yr warranty on the Einhell, the brushless motor, and its portability, the Einhell gets a solid 5 stars from me. Overall, I am totally impressed and MORE than pleased with this beast.As the parent of kiddos with autism, there are causes near and dear to my heart. Let Amazon donate to your favorite charity! Use Amazon Smile (smile.amazon.com) when you order and Amazon will donate to the charity of your choice when you make a qualifying purchase. Check out how Amazon Smile works at https://smile.amazon.com/gp/chpf/about/ref=smi_se_rspo_laas_aas. My shopping is donating to my favorite charity, Canines for Independence at no cost to me. Awesome!This is a good looking, easy to hold rotary hammer that is intended to drive hammer blows into a hard substance in order to break it up.The tool is easy to hold, and while on a ladder I was able to lift it into position with only one hand, fairly easily actually.In use, the tool is very durable. When dropped from a small height it was super durable and resilient.The drill also has a few nice touches, like LED lights facing forward to see what you are doing, and an SDS slotted chuck to keep the bit from rotating while being driven.The battery lasted about 40 mins or repeated use, which involved chiseling away at a old plaster wall, then prying it off with a pry bar, then continuing to the next spot.Overall a fantastic light - to medium duty tool.I’ve only had occasion to use just a handful of times but I’m really satisfied with it. I really wanted an impact driver mainly because I don’t have a nail gun so there are projects that will require a A nail gun but an impact driver works so much better than a regular One for those jobs. It’s very loud but it’s a good product. There were a few times where the screws did not go in as far as I would’ve liked but for the most part it’s great. That could’ve also been user error because I’m not used to using this.I own a few Einhell tools and they never let me down. This Hammer drill is no exception.This is a good drill to get if you like tools that can do more then 1 thing and do it well. Great for going through concrete, Bricks and stuff like that.It has globs of power for all of my needs. This is like a Multi Tool with everything it does. It's a can drill, impact drilling, chisel drill. Has a pretty bright led light on the base of it. Has a Brushless motor which is plus if you use alot of power tools you want this. They usually cost more but they last longer since it's less wear and tear on it and it's they make more powerIt also comes with a really nice hard case.I mainly use this for the automotive side of things. If I need a really strong drill this is what I get out. I've also used this for bolts that won't move. The hammer jack is a wonder tool if you have it.This drill is heavier then my regular drill but it's a tradeoff for all that this drill does. This is good for Construction, if you have to drill in concrete, brick or automotive which is what I use it for. It's a powerful drill and the jackhammer setting is pretty good for bolts that won't come out on the automotive side.