Description of π§ Enhance Efficiency with Norske Tools NDHSI108 Industrial Diamond
Utilizes high grade diamonds and heat-resistant vacuum Braze to deliver best-in-class performance for extreme life. For drilling holes in abrasive materials including tile, stone, glass, brick, block, and cement backer board. Impact rated For heavy duty use. Must use with water.
This is better than I expected based on other reviews. The circle cut will have slightly broken edges, but that's fine for my use case. I've only used it once, so I can't comment on durability yet.
Worked with no problems. Did a quick job with a wall tile that I had to drill through. The drill did not get very hot, cut cleanly and showed no wear after a few holes. This worked much better than some of the cheaper bits I decided to try. Worth the extra cost.
I used this to poke holes in the bottom of a pair of old glazed ceramic bowls to use for small flower pots. The holes are nice and clean and the bit worked quickly with very little effort. I used an old Windex spray gun to cool and oil the finish. Went like clockwork. I only drilled a few holes but the drill bit looks and feels like it's almost empty. I will define more as needed.