3-Inch Small Size Wooden Step Ring Mandrel This set includes six 3 inch wood step mandrels,and they sit on a wood platform 4 1/2 x 3 x 1 inch Each mandrel is made of smooth wood, and has two in full sizes, no half-steps Mandrels are sizes 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 ,13 & 14 - set weighs 1 pound 2.4 ounces Steel base platform is 4 x 3 inches, and side is 3 inches square with a steel prong for mandrels Great for shaping and sizing rings, and wrapping wire to just the right size