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. Designed to fit in limited space on many water-cooled 2-stroke engines. Ratchet mechanism works one way, turn over to reverse. Fits standard 13/16" plugs. Note: Optional Motion Pro Extension Socket For Ratchet Spark Plug Wrench (sold separately) allows the Ratcheting Spark Plug Wrench to be used on recent models where the water neck prevents the use of this tool alone.