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This comes with blades installed. But when you need to replace them it is really easy. The three replacement blades each come with the shield and you just open up the razor, turn the little lock to release the blades, pop the old ones out and put the new ones in their place. Very easy.
Sorry, there was a problem. Please try again later.Hello! Philips Norelco 4100 series shaver replacement blades process can be found on the Owner's manual attached on pages 23- 25. https://www.download.p4c.philips.com/files/a/at810_41/at810_41_dfu_aen.pdf
Sorry, there was a problem. Please try again later.Easy enough. Pop open the top as if you do when cleaning it. Turn the center black dial which is on the head one click, lift off the grey blade assembly, remove the blades and carefully replace them the same way you removed them. If you are unsure of the process, take a pix with your phone to remember how it looked
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