"Having spent many years of frustration with drill bits just not up to scratch, causing delays and extra sweat on various jobs requiring drilling, I am please to say that these bits do the job in concrete. 30 holes later at a depth of 40mm in concrete with ease, it's value for money that saves you you money by doing a job quicker, without the cursing!"
"After having got through many a bit by trying to drill concrete I thought I'd try these, after all they say concrete in the description. I certainly wasn't expecting anything this good. Not perfect but well worth the money"
"I have purchased several 6mm drill bits over the years being self employed it's important that my kit does not let me down, Bosch have without a doubt created a product here that is worth every penny, thumbs up guy's, the drill bits work hard, quickly and cleanly making my life alot easier."
"OK this is not a ‘Which’ quality review but it is probably better than many of the individual comments that are posted. Wife wanted to make ten three tier cake stands so I had 30 plates from an old dinner service to drill holes in. I purchased three 6mm masonry drills to compare performance, Bosch, Erbauer and DeWalt and started drilling. I drilled all holes with water lubrication but no hammer action. The Erbauer was half the price of the other two and significantly inferior in performance. The Bosch was slightly better at drilling than the DeWalt but the DeWalt had a little dimple that made it easier to start without skidding and also had a triangular shaft which would help prevent slipping if used with hammer action. So in summary you gets what you pays for!"