Wahl Premium Hair Clipper Blade Lubricating Oil for Clippers, Trimmers, & Blade Corrosion for Rust Prevention – 4 Fluid Ounces – Model 3310-300ARust Prevention Prevents rust from forming & helps extend the life of the clipper & blades; can also reduce the likelihood of blades becoming dull Prolongs Blade Life Apply two drops of oil on the left corner, two drops on the right corner, and a single drop in the middle of the blades every few haircuts for optimal blade lubrication and to reduce friction and heat Premium Formula Wahls blade oil is specially designed for all Wahl electric hair