General description The 531 pcs grinding drum set is designed for use with Dremel rotary tools, featuring a variety of sanding drums and grinding wheels in different sizes and grits. This comprehensive set includes self-tightening drill bits and drum cores, making it an essential addition for DIY enthusiasts and professionals alike. Technical specifications Polishing Drum Sizes: 1/2 inch, 3/8 inch, 1/4 inch Drum Core Sizes: 1/2 inch, 3/8 inch, 1/4 inch Material: Alumina Color: Reddish Brown Package Contents: 24 x 1/2 inch Sanding Drum (80 Grit) 24 x 3/8 inch Grinding Wheels (80 Grit) 24 x 1/4 inch Grinding Wheel (80 Grit) 24 x 1/2 inch Sanding Drum (120 Grit) 24 x 3/8 inch Grinding Wheels (120 Grit) 24 x 1/4 inch Grinding Wheels (120 Grit) 24 x 1/2 inch Sanding Drum (150 Grit) 24 x 3/8 inch Grinding Wheels (150 Grit) 24 x 1/4 inch Grinding Wheel (150 Grit) 24 x 1/2 inch Sanding Drum (240 Grit) 24 x 3/8 inch Grinding Wheels (240 Grit) 24 x 1/4 inch Grinding Wheels (240 Grit) 24 x 1/2