Details: The Wahl Clipper Detachable Cordless Hair Clipper Blade Replacement model 2167 features precision ground, stainless steel blades that not only self-sharpen but also maintain their sharpness for longer periods compared to competitors. These blades are easy to attach and do not require tools. Simply remove the old dull blades and snap on the new replacement blade. Designed to fit various Wahl hair clipper models including models beginning with 6275LP, 9179, 9590, 9591, 9639, 9645, 9649LP, 9655, 79434, 79003, and 79005. Rest assured, this is an authentic Wahl Clipper product, promising the highest quality and performance.