"The drill bit does not melt at high speeds like others do. It does not need water. Debris can be tapped off easily and have used it on ceramic tiles and still going strong after 10 holes. Other s lasted 2-3 holes before going blunt/melting."
"Before buying this drill I bought the dewalt diamond tipped drill bit which took 30 mins to drill a single hole in grade 5 porcelain tiles, and required continuous water cooling. The Erbauer was night and day different, straight through the tile within 3 mins and without the need of water spray, I drilled several more holes and its still like new."
It did a good job with most holes very clean. I used theErbauer guide with it and it definitely helped. Need to apply a bit of pressure behind the. Drill but it works it's way through the tile pretty well. Have used other brands and among the best I've used.
I found that the bits were getting hot and smoking a bit so would run the, under the tap briefly.
Not used on any other materials yet and not had enough use to comment on reliability but so far so good."