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. Fits the straight-slot timing plugs on most motorcycles and ATVs. Blade sizes are 16 mm (5/8"), 22 mm (7/8") and 38 mm (1-1/2").