5 Piece Concrete Drill Bit Set, German Material Carbide Masonry Drill Bits for Concrete/Ceramic Tile/Brick/Wall/Plastic/Wood/Glass, Twist Tip Bit Tool by Eaninno (6 6 8 10 12mm)

Update 1/2019: While we've not used the larger bits, just the 6 mm ones for the Wife's pot people, they are holding up well after 100's of terra cotta holes. The sellers are going to make more clear the fact that while they're assembled in China, the bits (arrowhead tip) are made in Germany. Went from 3 stars to 5 stars, they do what they're sold to do. We're happy with them. End of update. The Bosch glass & tile, and Bosch brick & block bits are junk. They would last about 20 seconds into the sides of terra cotta pots. Tried the 5 piece set with EANINNO label on one side and Made In China one the back of the box. They have a sharp arrowhead tip inserted into the split shaft. I wouldn't use 'em in hammer drill mode, but they went through terra cotta and stucco like hard butter. No wandering, very easy starting, worked well w/o water too - not even warm. Now, I'm ordering some 1/8 " single cheapy bits with the arrowhead design from the Zon. FYI, y'all.

I was trying to drill through porcelain wall tiles with my standard masonry bits and it was impossible. I would have to start with a very small bit and then work my way up the size I needed. It took a good 15 minutes per hole. These are basically the same idea but OH MAN, so much faster. They give you two pilot (start) bits and then you can jump to the proper bit. It took less than 20 seconds to drill the pilot holes and another minute to change bits to size. Literally 2 minutes per hole in porcelain!One thing, when drilling you want to have a spray bottle to spritz the bit with water as you drill. These things will get hot enough to melt the edge, so they must be kept cool and lubricated with water constantly.The best money I have spent on tile/stone bits, EVER!

Nice kit and ready to use

My project specifically called for a 6mm masonry bit to drill the holes in stucco for anchors to mount a garden hose hanger. I couldn't find just a 6mm bit sold individually and didn't want to use the 1/4 inch bit I already had since that converts to 6.3mm and I feared the holes would be a tad big for the anchors to grab properly. So, I bought this set of 5 bits covering 4 sizes because it seemed like a good price and included two 6mm bits. As it turned out, either the instructions that came with the hose hanger were wrong or they included the wrong size anchors with it because 6mm was definitely too small. So, I stepped up to the 8mm bit which turned out to be the correct size for the anchors provided. Unfortunately, while drilling the holes in the stucco, I somehow managed to break off the tip of the 8mm bit. I was able to finish the job. nonetheless, and after learning of the difficulty I encountered, the seller sent me a replacement set of bits for my trouble. Eaninno USA is clearly committed to backing their product and satisfying their customers.

I needed some bits for installing safety/grab rails in my mother's bathtub area.They arrived quickly and I tried one on a hard floor tile and it went through it easily....don't press hard, keep the bit wet, and keep your RPM's low.The wall tiles in my mom's bathroom were softer than the floor tiles...was like going through hard wood. Very easy. I highly recommend these bits. No cracking or chipping and they didn't walk across the surface...I think if I had tried to start the hole at a fast speed it may have walked around but I went slowly and placed the holes exactly where I wanted to

Couldn't finish not even one bathroom! Wasted money. I used a lot water for cooling and lowest rpm on drill so stil bit wouldn't burn. 1st hole to the center of the tile was fine, 2nd was very close to the edge of a tile and drill bit head chipped away, 1st drill bit was trashed! 3rd hole i had to use new drill bitThat one cracked inside the hole while drilling and that's how i ruined 3rd drill bit. Little piece of metal from previous drill bit inside the hole cracked 3rd drill bit. Luckily i had hammer drill and old school Bosch drill bits so i was able to finish the job. Very very bad for ceramic tiles

Low cost for small job. I needed to drill (8) 1/2" holes in ceramic tile. I started with the "1/4 inch" bit, then used the "1/2" bit to finish the job. Here was the first issue. The advertisement on Amazon equated 12mm with 1/2". I should have checked this closer. 12mm is .47". I then had to use a third drill to get the hole to 1/2". Warning, the size errors are true for all the bits! To get the holes drilled I had to use a hammer drill with considerable pressure to get thru. If you do not have a hammer drill, be prepared to use a lot of force! It says to use water to keep the drill cool which I did. The shank of the drill started rusting within an hour. Bottom line-These are metric bits for limited use. Basically throw away after a few uses.

OMG, bought these to install my ring on my brick exterior. Used the bit that came with the ring “made for concrete, masonry, blah blah - Rounded the tip. Used the masonry bit that came with a tool set, nothing. Then I’m like I need a big butt drill with the diamond headed jack hammer, tear down the building driver. Mwwwaaahhahahahahhaahaaaa.Nope, ordered these, came the next day. Used 20v cordless “drill” and like a hot knife through butter, 30 seconds later had 4 x 1” deep holes. I’m like hells yeah, but the destructor in me really wanted the hammer drill. Oh wellgreat bits, used on brick, made holes quick and easy using household drill.

After 1st time use on concrete wall, the bit broke off and the drill body was worn out!The bit was initially stuck in the hole. it was only after much effort that the bit was dug out, if not the hole would be useless and unable to be reworked. Terrible experience.Following the instructions, only used drill mode and not hammer mode.It lasted only a few seconds in the concrete.