The size and design allows any hobbyist to get into tight spaces and helps sand delicate and obscure project parts and pieces. Ideal for use on plastic, wood, and metal mediums. With five different color-coded grits, you are able to complete a project from start to finish. Each sanding stick measures 5-3/4 x 1/8". Mini Hobby and Craft Sanding Sticks are available in 100, 180, 240, 320 and 400 grit .