Replacement blades that use a 5-blade system and 3D head to fit the skin and provide a smooth shave. I am selling these because they didn't suit my skin. I used the holder and one blade, so I am selling only the replacement blades for hygiene reasons. - Brand: KAI - Model: Xfit - Number of blades: 5 - Number of replacement blades: 5 - Features: 3D head Thank you for looking.