Worx Cordless Lithium Ion Battery 5-in-1 Multi Sander Attachment Kit 20V 10,000 OPMWorx 20 volt battery Sandeck 5 in 1 multi sander with finger and detail contour attachments is for when you want to have 3 or 4 or 5 sanders at your disposal, but you'd rather have one sander that does it all. The 5 inches random orbit function is your workman like sander and does all the laborious, initial sanding. The 1 4 inches sheet finishing function of this cordless sander smooths it down. The detail function in this orbital sander lets you get