The 1005 3 Hole Blade is the standard replacement blade set for the Wahl: Senior, Cordless Designer, Vacuum Clipper, Pilot, and Designer Collection. Sterling: Nugget, Sterling 1 Plus, Cordless Sterling 4 and Sterling 4, making it ideal for many of the clippers in your Wahl Professional collection. The 1005 3 Hole Blade is designed for standard off-scalp clipper cutting and blending. Package contains (1) Wahl Professional Adjusto-Lock (1mm – 3mm) Clipper Blade set #1005. Blades made in the U.S.A.