2pcs 3/4-Inch / 20mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz

This bit was a great value because it performed exactly as I had hoped. I used the bit to drill a hole to insert a spigot into a terracotta planter. The pot will be used with a rainchain to collect and divert roof runoff water. I used a regular handheld drill on fast speed at first to make an indentation into the pot and then I used slow speed to drill the hole. I poured water over the area about every 5 seconds to keep the pot from cracking. I found the bit easy to use because I didn't even have to press hard with the drill and I have small hands and am not partcularly strong. The hole (lol) process took less than five minutes and the bit seems barely worn. In the pictures, the worn bit is on the left. I used size 25mm for a 1 inch hole but had to enlarge the hole slightly because of the threads on the spigot; the 26mm bit would have worked better. I think I got my money's worth.

These things are perfect for drilling holes in the bottom of my pots! Easy to follow the directions (youtube). Good value for the money. A hardware store tried to sell me something for $25.00. Seem to be durable also.

Worked to cut through an inch thick ceramic planter without causing damage. I don't feel right giving it 5 stars because these are obviously cheaply produced and not meant for longevity, but beyond that they did the job for a good price.

I'm the guy that shouted to the rafters on this set of core drills. After re-thinking how I was using the bits(hand held drill motor) I properly put one of the bits in a drill press and used it to bore a 3/8" hole througha ceramic vase. It worked perfectly. I feel so bad about dissing this product. I need to be ADMONISHED"...

I needed to cut a hole through the exterior stucco/wire on my home. This thing cut through it like it was nothing.....NOTHING. For the price I was really surprised how well it worked. Buy this one if you need to cut through masonry--you won't be disappointed!

I’d give this zero stars if possible.. bought to cut holes in finished large format kitchen tile to install butterfly anchors for brackets (for shelves).. one bit cuts one hole only.. becomes immediately dull and useless thereafter.. absolute garbage cheap Chinese product. Returning them…. Junk. Don’t buy these

it's good these come in a 15 pack. I used 12 of them drilling several holes in marble and tile. The base material is soft/cheap, so it doesn't hold up. It overheats easily.But, they are inexpensive enough that it got the job done and I'm satisfied. NOT a professional's tool, but if you have a job or two to get done - these should work.

Great addition to the shop