The DeWalt glass and tile drillbits contain the following features:
Easy and accurate positioning of hole and reduced risk of walking;
Water greatly improves drill bit lifeand drilling speed;
Central core created during drilling stops drill wandering;
Core can be removed easily through core ejection slot.

Applications:
For drilling holes in glass, slate, granite and tiles including porcelain tiles up to grade 5.

The DeWalt DEWDT6040QZ tile drillbit is 8mm.