6 piece full round sanding sticks in 6 grits: 6/0, 4/0, 3/0, 2/0, 1 and 2 are great for inside ring and curved surfaces. Excellent for all precious metals and metal clay. Each measures a total of 9-1/4" with a sanding surface of 6 which tapers from 3/4" wide to 5/16" wide at the tip.