Soft microfins placed before the blade to help stretch skin and prepare the hair to be cut. Self-adjusting twin blades spring mounted for a great shave. All sensor cartridges fit all sensor razors. Gillette Sensor Excel cartridges feature soft, flexible microfins positioned in front of the blades to protect the skin. These blades deliver a close and comfortable shave. The cartridges' microfins allow for smooth shaving and prevent redness and skin irritation. With pivoting heads, the razor blades glide effortlessly over the contours of your face, removing more hair with fewer strokes. You won't run out of razor cartridges any time soon with this combination Gillette Sensor Excel refills.