By the way, I spoke directly to Bosch and this is a Bosch product. Several weeks have passed. They explained to me that the number is different but it's 100% the same quality because it's Bosch. Also, it was very helpful for me to have someone to talk to about the best attachments for my needs. Also, some of the information about rock drills on both the Revain site and the Bosch site was WRONG; how many settings and functions. I was looking for a battery powered cordless hammer that could do what I wanted (the hammer part) and the description said a specific hammer would do it, but that wasn't true. The battery hammer is not available. I also wanted to order some other lures but the first person told me about it; however, he misled me into exchanging the first punch I received). So I called back. You could see in the picture that the hammer only had two settings, but the description mentions three functions. Although this bit has a different number, it is an official Bosch bit.