Rubi 5/16 in. Wet Cut Drill Bit

Tough bit. Just right for drilling glass.

Good product, good price.

Excellent for drilling in porcelain. I use this to make bots for bonzai.

Worked great. Drilled 6 holes in 3/8″ porcelain and could easily have done more. Recommend drilling the same size hole in a scrap piece of wood first to use as a jig, which makes starting the hole in the tile very easy. And use a spray bottle of water to keep the bit cool. Be patient, as it does take a few minutes.

Of course it takes time for this bit to cut through ceramic or tile, but the cut is clean & smooth. Pleased with the result.

I did not use this for glass or ceramic. but, it did what I wanted.

I bought a few of these diamond-tipped drill bits to drill through newly-installed 3/8″ porcelain floor tile. I tried drilling first with the aid of a guide, but found it easier to just start drilling at a 45 degree angle to scratch the surface and then drill upright. I used my battery-operated P-C drill. I drilled four 5/16″ holes to install a Toto toilet, and then three more 5/16″ holes to install a door threshold. Each hole took about 20 minutes to drill, including switching to a mason bit to finish the holes, punching into the concrete pad below the tile. I kept the bits cool by applying a little water every 3 – 4 minutes. By the seventh hole, the drilling took a little longer as the drill bit wore down, but I was happy. that one bit could drill seven holes into some really hard porcelain tile.

Drill cuts well. have drilled about 6 glass plates for wife’s hobbies. No way to center drill. Tends to walk as you start to drill. Once hole started, drills right thru.

Worked as advertised. Great bit at a great price. They did the job. Thanks.

This drill did the job I hoped it would do.