1.Excellent Material The reversible ratchet ring wrench is made of high quality chrome vanadium steel. Made with excellent production technology and has a long life. Chrome vanadium steel material, high hardness, good toughness, wear resistance, stability. The surface is polished, corrosion resistant. 2.Application The openend wrench is widely used in medical equipment, marine, shipping, petrochemical, nuclear and many industries. Whether you are working on DIY projects, automotive work, plumbing, air conditioning repair, bicycle repair, furniture assembly, and other hard jobs that require just a bit more clearance. 3.Advanced dropforged process: The spanner is unique drop forged, high hardness, strong torque. Nonslip, wearresistant, precision casting technology. 4.Ergonomics: The reversible ratchet combination wrench has a corrosionresistant highgloss polish for improved strength. The openend wrench reduces hand strain and fatigue during prolonged use while providing enough power for hard fasteners.