Wright Tool 9424 Nominal Size 12 Point Offset Reversible Ratcheting Box Wrench, 1/4" x 5/16",Wright Tool,9424" /> Size-1/4-Inch x 5/16-Inch weight 0.15 Nominal size 1/4 x 5/16-Inch length 4-1/4-Inch Reserve of strength for tough jobs Distributing stress evenly over a larger contact area and away from the fastener corners Features the patented Wright Drive and Wright Grip, which provides more torque with less fastener damage