The 2191 Adjustable 0000 Clipper Blade set is intended for professional use only and is designed to deliver the sharp performance that experts demand. This adjustable clipper blade fits the #8545 5 Star Senior and the #8451 Magic Clip, and from the Sterling Collection it fits the #8501 Reflections Senior. This blade is adjustable with zero-overlap capabilities for precision fading. Package contains (1) Wahl Professional Adjustable Clipper Blade set #2191, oil, screws & instructions. Blades made in the U.S.A.