Vacuum Brazed Core Bit Kit 8 Piece in Case
1/4 in, 5/16 in, 1/2 in, 3/4 in, 7/8 in, 1 in and 1 3/8
All have 5/8-11 UNC Screw Thread
Which is the same as 5/8 inch Angle Grinder Thread Size
So Just Screw onto angle Grinder
Use at High Speed with or without Water
Just Start cut at slight angle until groove created then slowly bring to upright.
Diamond Hole Saw Guide included