Tork Craft Is A Favourite Brand Known Throughout Southern Africa. Complimenting The Whole Tool Industry With An Extensive Range Of Accessories To Simply Make Your Work Easier And Make The World Go Round 4mm glass and tile drill bit Application: For smooth drilling in glass, mirrors, ceramic tiles and marble tiles. Note: Max 500 RPM with no hammer action. Tip: Use water or paraffin as coolant when drilling into glass. What's in the box 1 x Glass & Tile Drill 4mm