This sanding drum kit has everything you need to get sanding with your Dremel like rotary tool. The mandrels are 1/8” in diameter and ½” long and the matching sanding sleeves come in 4 grits. • 100pc in a Bag • 25 of Each Grit: 60, 120, 240, & 400 • Comes with 2 Rubber Mandrels • Mandrel Shank Size: 1/8” by EviesToolEmporium on Etsy