WAHL's blade oil is specially designed for all WAHL electric hair clippers, trimmers, & blades; Works well with other brands & blades. Prevents rust from forming & helps extend the life of the clipper & blades; can also reduce the likelihood of blades becoming dull. Simply place 2 or 3 small drops of oil between the blades every few haircuts to maintain optimal blade lubrication; Lubricated blades also can reduce friction and heat caused by unlubricated blades. WAHL clippers and trimmers have been used by professionals in the salon & barber industry since 1919. With self-sharpening precision blades WAHL clippers, shavers & trimmers deliver a smooth shave. Makes great personal gifts for the men in your life. Dads, husbands, and boyfriends will love this top-rated precise clipper for any occasion. Product in packaging may not be exactly the same as photo due to continuous improvements to the product.