Drill holes of every size and shape in some of the hardest material with diamond-coated steel bits. Use in rotary tools or bead reamers or hand drills for a smooth hole.  includes: 5 ball , 7 cylinder with flat tops, 6 cylinder with round tops, 1 sharp cone, 1 tree, 3 points, 1 cone, 2 bullet, 1 echelon, 1 long point, 1 flat cone and 1 long sharp cone burrs.