Mohoo 63pcs 80 Grit Drum Sanding Kit Dremel Nail Drill Sand Mandrels 1/2 3/8 1/4'' Durable and practical With small, good polishing effect, high efficiency, low cost. Color:Brown & Material:Aluminium oxide Inner Diameter of Bands:1/2",1/4",3/8" ; Height of Bands:13mm/0.51'' Length of Mandrels:38mm/1.49''