These fingers are made from 1/2" thick steel. They give you the benfit of dragging your board back to you. This not only saves you time, but also makes for a lot less labor. As soon as the head returns with the cut board, you are ready to turn the log and start your next cut.
Included with the drag-back is metal plates in the bed to keep boards from falling through when you drag back each board. This makes for a true one man operation.