Wright Tool 9397 Reversible Ratcheting Box Wrench, 1/4"-3/16" Square x 9&#39;16"-1/2" Hex,Wright Tool,9397" /> Size-1/4-Inch 3/16-Inch square X 9/16-Inch 1/2-Inch hex weight 0.23 1 9/64-Inch Length 7-Inch Distributing stress evenly over a larger contact area and away from the fastener corners Reserve of strength for tough jobs