A more comfortable shave: Old heads may become dull or worn, causing them to pull on the skin and create discomfort when shaving. Replacing the shaver head ensures a smoother shave and less skin irritation. Cleaner shave: Changing the razor head is sharp and efficient, allowing for a more thorough shave and avoid stubble residue for a cleaner, more refined shave. Extend the life of your shaver: Replacing your shaver head regularly can protect your shaver from damage to other parts of your shaver from excessive wear and tear, thereby extending the overall life of your shaver. Save time and effort: Changing the shaver head is more efficient and saves time by eliminating the need for repeated shaving, while reducing the need for extra force due to blunt the head and making it easier to shave. Compatible For Philips,Shaver HQ9 Replacement Head AT751 HQ8240 HQ8250 HQ9070 HQ9160 HQ9170 HQ9190 Shaver Heads Blades