BoschHC2127 3/4 in. x 16 in. x 18 in. Bulldog SDS-Plus Rotary Hammer Bit

This is a GREAT drill bit if it fits your rotary hammer. Sorry for the 1 star but I needed to get your attention.I had NO idea they made two different size SDS bits. Yes, I live in a cave. I've always had the larger size SDS which they call Max. This drill bit is called SDS Plus which is a STUPID word to describe the smaller one (in my opinion). Lets face it. If your significant other is a "Plus" size then they are large. That's how the word "Plus" is used these days... Yes, I did read the description and I did look at the pictures. I also saw the word "Plus" so I'm not blaming anyone but myself but COME ON This is a 39" beast with a tiny little toddler SDS shank on the end. I didn't even realize they called the larger SDS a "Max". When I saw "Plus" I just assumed that's obviously what I have as I've never seen a larger one than mine. Again, who uses the word "Plus" to describe the smaller of two things?? That's like saying Andre was not a Giant was only enormous.Looking at the Amazon ad- one pic is correct in showing this bit and the other shows the larger style. Due to the fact that this Amazon ad is for different size bits It didn't really think much of it. Don't do what I did! Order the correct size bit and understand that there is a smaller version of the SDS out there that they call a "Plus" size.

The drill bit is everything that it's supposed to be; however, there is a possible downside and it has nothing to do with the drill bit itself. Be warned. Whomever was responsible for packaging should either be offered a job at Fort Knox or become a target at a shooting gallery. The tool was wrapped in this adhesive, form fitting bubble wrap that in my 70 years have never encountered. It took me 24 minutes to extricate the item from this stuff. It took 24 minutes of cussing that I didn't know that I was capable of and I'm a former Marine. It was the toughest material that I have ever encountered and I'm not exaggerating or embellishing my experience at all. You will need an extremely sharp razor knife and wear gloves. It is truly nasty stuff. I almost gave up to either run off and join the French Foreign Legion or search for God at any monastery that would accept me. You have been warned.

It gets the job done but it is NOT 8" long... actual penetration depth is about 4.5" (and yes, that is what she said).

I bought this DeWalt and the similarly priced Bosch bit for installing wedge bolts in concrete to mount fence cloor flanges. I started with this one, and only realized how much better that the DeWalt worked than the Bosch when I swapped bits as the wear mark on the DeWalt started to fade (about 50 holes in, and a feature not present on the Bosch) and realized that brand new the Bosch did not work quite as well as the worn DeWalt I had just swapped out. It worked to finish out, but I am just getting DeWalt if I ever have to drill concrete again.

I’m halfway through getting out of my house with this through the basement 6” cement flooring. Took me a while and burned up a craftsman and overheated a dewalt. Told the wife I’m making repairs...It’s holding up pretty good. Despite how crazy slow it penetratesI’ll let you know when I reach Cabo.Keep your bikini on. I’m coming. I’ve got 6 more drills so I’m good!

Bosch calls this a 10" bit. In the smaller print, they say that its "usable length" is 8". I bought it to drill holes in 8" block, so, based on the description, it should work. No! I drilled until the chuck touched the block, but the bit didn't come through the other side. I placed a tape measure on it, and when this bit is installed in an SDS Plus drill, the distance from the chuck to the tip of the bit is only 7-5/8".

Shame on Bosch, all i can think to say. It drilled thru the mortar part decent enough. Luckily my center was thru cross of it, I did 2 more from inside again thru mortar Moved outside, started a hole thru actual brick. First hole was accurately difficult, being not the mortar. Started 2nd hole, got 1/2 inch at most and i started to see tip get red or sparks, whatever you want to call it. Yep, i was not going any further. Moved to try 3rd, Dead useless, I was able to turn hammer drill speed down and attempted to make little starter nipples for the rest. Were talking like 16-18 more needed to take chisel to brick and break out. I had to go find any masonry bits i owned, like 2-3. Now i have none. I melted tips to both them. I got 1 1/2 more complete holes. I decided i just have to start chiseling. I went inside and chiseled with a smaller one to crack the brick so when i got to from outside maybe i save face. It worked. I went back and finally chiseled out the hole. 45 minutes of chisel with carefulness.The Bit was new, i had to break the holder to remove from it's Bosch packaging. So i know it was a new Bosch 3/8 8 in. It even says SDS Bulldog PLus on pkg. But it will never be able to use again properly.Not even sure will work on just mortar? The tip i now looks like a drill bit no tip wing. So if you plan on going thru concrete or mortar, buy it and hope finish project. If your going thru brick to install dryer vent like i did, better have back up mortar bits to ruin as well as the Bosch. Again i'm disappointed with Bosch product, and it'a ability to go thru brick. As much as i liked to taken pictures. I spent almost 4 hrs on this project, stopping to take pictures and being irritated, wasn't my thought. I was trying to avoid 5 trips to home store and having a mess.

I use these type bits a fair amount and if Im doing just a few holes of an odd size, I'll go get a cheap import bit, BUT if I have a bunch of holes to drill, I always use Bosch bits. I drilled over 100 holes 6" deep with this bit and its still going strong. The holes were drilled in cured concrete, not green concrete, so the bit did have to work and it shows very little wear and that is even after hitting some rebar a few times. I tagged some rebar hard enough to stall the drill and figured I chipped the carbide end...reversed it out and the carbide was fine. Very well made bits.

Really solid rock bit. I've done 40 or 50 holes in granite and some in limestone, basalt, and gniess.Still going strong. Highly recommended.Beats the pants of the hardware store bits that drop the carbide after 6 holes...Be sure to grease the sds drive and go lightly, you don't want to force the bit against the stone. It needs to be able to bounce a little to work efficiently.

As seen in the photo, this was a relatively expensive failed experiment. I attempted to use this drill bit to make a water feature. I was barely able to make a mark before the bit was dull; even with flowing water to keep the bit from heating.

Good thing i bought 2.First one broke (more like shattered) in 3 pieces not even 1" into the first hole.In 20 years of construction and working with sds drills regularly and thats the first time i have ever seen THAT happen.Bosch bulldogs are generally usually good bits. Not sure why this happened, thinking i wound up with a dud.

Bought to replace a dewalt that broke after 2nd use. Bosch is the only way to go for sds products. Made in Germany. Bosch products seem to have higher standards for quality than most other companies I've tried. Very pleased!

Seems like a very high quality bit, and drills through block and poured concrete very well. Just be aware that the smaller bits like 5/32 will only drill about 2.5" before the bit flares out to the base. So if you are trying to drill a sill plate to concrete for tapcons or whatever fastener, you may want to move up to a 6" long to get a little more depth.