Park tool spa 1 pin spanners are designed to give maximum usefulness and versatility at the best value tough high carbon tool steel is used to ensure long life and the handles are vinyl coated for a great grip and color coded for easy identification the green handled spa 1 fits adjusting cups on most 3 piece cranks park tool spa1 pin spanner features the green handled spa 1 fits adjusting cup on many adjustable type bottom brackets the pin ends are round with a diameter of 29mm p