Motion Pro is dedicated to producing the most versatile, unique and durable products for professional and home use. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions. One of their goals is to offer tools of convenience. Do it right the first time with Motion Pro Tools. Originally designed for the Honda XR400 as a trail tool, but fits many models with 18 mm plugs. Thinwall design to fit into low-clearance plug cavity. Socket can be driven with various tools including the Motion Pro Spark Plug Ratchet Wrench, 3/8" ratchet, 13/16" wrench, tool kit bar, or a Phillips screwdriver placed through the 8.5 mm hole at the top of the socket. Limited lifetime warranty. Known to be suitable for: