These economical and functional sets are a good value for the novice or hobbyist.  Diamond points can be used on ceramic, glass, metal or stone.
Each set includes 20 diamond-coated points in different shapes and sizes in a handy plastic organizer.  Points measure 1-3/4" (44.5mm) overall length.  
Max operating speed: 30,000rpm.
Your choice of 3/32" or 1/8" shanks.
            