Park Tool Pin Spanner - 2.9mm SPA-1 Fdiameter_30.9mm Dumonde Tech worked diligently on

Dumonde Tech worked diligently on our next generation of bicycle chain lubricant for several years

Separates into two pieces

11 and 12-speed derailleur chains that use a masterlink

Trail (X7/X9/X0 Trail)

hollow-link chain for 10 speed systems

Park Tool Pin Spanner - 2.9mm SPA-1 Fdiameter_30.9mm Dumonde Tech worked diligently onPIN SPANNER Park Tool Pin Spanners have been designed to give maximum usefulness and versatility at the lowest possible cost. Tough, high carbon tool steel is used on each tool to ensure long life. Handle is vinyl coated to give a good grip. Each Pin Spanner is color coded for easy recognition. WARNING: California Proposition 65 This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive