|The Osibin Sphere, Oblate and Disc Former is a graphite shaping tool with six different, round bottomed, grooves, three on each side. At the edge of the tool, the grooves are about one and one half as deep as they are wide. As the grooves extend into the graphite, they become shallower, until there is no depth left. Each groove is a different width to create different bead sizes. Groove widths are 3/8", 1/2", 5/8", 3/4", 7/8" and 1". The former will make an oval bead when working close to the shallow end. A little further in creates a nice sphere or round bead. Towards the deeper end will form an oblate bead and near the very end will create perfect donut or disc beads.