The ToolPro features an ergonomic wood handle that is offset from the base plate for knuckle clearance The sander has a temperedaluminum base plate with a polyethylene pad For use with diecut sanding sheets or a half sheet of standard sandpaper Wingnut thumbscrews can be used with multiple sheets Simply load paper and remove one sheet at a time when it becomes worn to have a brand new sanding surface Sander size 338 in x 938 inErgonomic wood handleLightweight and strong aluminum baseThumbscrews allow for multiple sheets