Review on 💎 Dazzling Beauty: LaVieEnRose Cutting Diamond 4 Inch 5 Piece Set by Jeb Moorehead

I was surprised to see how well the 1/4" bit cuts. I don't know how long they last but for the money you can't go wrong. Tip: mallet and glass moisten before starting. I used a cordless drill at high speed. Tilt the drill about 45 degrees to score the glass, then slowly raise the drill to a vertical position. Be careful to apply light pressure and the to keep the drill wet.