Double Third Hand Tool For Soldering & Welding. This is a new double third hand tool. Great for holding 2 parts in position to be soldered or welded together. Allows user to have both hands free. The base measures approximately 3" (76.2 mm) in diameterWe work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.