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Review on Mgtgbao 1 Inch (25Mm) Dry Diamond Core Drill Bits, Vacuum Brazed Diamond Hole Saw Kit For Porcelain Ceramic Tile Granite Marble Stone Brick Glass With 5/8-11 Thread by Dean Wildfang

Revainrating 5 out of 5

Used to etch small marks on beer glass bottoms for bubble and foam propogation

I used this bit to scratch small marks at the bottom of some beer glasses (on the inside) to give the carbonation nucleation sites, to make a bigger head and get good foam propogation. This bit worked great! Beer in these glasses now have a more persistent head that aids in the enjoyment of the beverage, creating a better nose and aroma.

img 1 attached to Mgtgbao 1 Inch (25Mm) Dry Diamond Core Drill Bits, Vacuum Brazed Diamond Hole Saw Kit For Porcelain Ceramic Tile Granite Marble Stone Brick Glass With 5/8-11 Thread review by Dean Wildfang

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Pros
  • Well made.
Cons
  • Slow cutting speed compared to other types of drill bits