toolantConcrete Drill Bit Set & Masonry Drill Bit Set, Shockproof Hammer Drill Bit Set (5pcs) for Concrete/Glass/Brick/Plastic/Cement/Tile, Industrial Strength Carbide Drill Bit Tip, 4-10mm Box of 5

Excellent drill bits!This was not a brand known to me, but drilled into brick without difficulty and remained sharp.If you're drilling into brick or concrete and your drill is a variable speed hammer drill, use a smaller masonry drill to make a pilot hole, then use the 12mm drill on hammer setting at medium speed.Be sure to use a spiral brush (also available on Amazon at a reasonable price) to remove all dust from the hole before inserting and securing a security bolt with hangerThese 12 mm drill bits are just the right size to drill holes for petzl anchor bolts and hangers to set up a security rope when climbing an 8.6 metre ladder to clean my solar panels.The drills are triangular where they fit into the drill chuck which means they never slip in the chuck.The drills are sharp, durable, and reasonably priced and come in their own transparent top plasticcase. I have no hesitation in recommending these drills.

Great drill bits for short drilling threw concrete with chipping in them ,But great for normal concrete. Would buy again.

Does "exactly what it says on the tin". Good drill bits.......great price.

Only used 2 bits but seem good quality and drilled into concrete with great ease

Having struggled with drilling into a concrete lintel with my "normal" masonry bits, wasting many minutes and making no progress, I decided to see if there was anything better out there. These had good reviews so I decided to give them a go. The difference is like night and day. These tackled hard concrete with ease; like the proverbial knife through butter. With masonry I always start with a small bit and work up through the sizes until I get to the required size. These performed that function with ease, giving nice, accurate holes. Durability-wise, they look like they'll last for a good few jobs and I'd say that they are good value for money.

Cut through concrete block easily where my other drill bits struggled.Great bit of kit

Good quality drill bits... strong and sturdy. Does the job. Prompt delivery. However one drill bit missing from the pack.

Very good product very good seller