This comprehensive assortment includes 10 varied sizes ( M3x3.7x10 to M6x9x22) with exact dimensional accuracy, ensuring seamless fitment into keyways for secure attachment of gears, pulleys, and components to rotating shafts or spindles Perfect for stabilizing rotating assemblies in automotive transmissions, agricultural machinery, equipment, and workshop tools where shaft to component alignment is critical Premium Carbon Steel Woodruff Set 80pcs of accuracy engineered semi circular components offering erosion resistance and rust proof durability for long lasting in demanding mechanical applications Engineered with hardened carbon steel construction, this Woodruff assortment delivers shear strength and wear resistance, minimizing component slippage and extending service life in high moment applications Ideal for professional mechanics, industrial maintenance technicians, and machinery engineers requiring stable fastening solution for power transmission systems and equipment repairs, Manufacturer: RGYBAO