If used improperly, there may be cuts. PEAK PERFORMANCE: to maintain your best shave, we recommend replacing the shaver head every 18 months Aazon.co: Braun Series 6 Electric Shaver Replaceent Head with... Take care of your shaver, and it'll take care of you., Directions 1., Push up the old replacement part from the front to the back to remove it., 2., Click your new Braun shaver head into place to reset your shaver to new. That's why Braun recommends changing your shaver's foil & cutter block every 18 months to get your shaver back to its best. Braun Series 5 Shaver Head Replacement, Black Simple replacement : easily attach your new shaver head - just by clicking it on. ... Shaving Head 53B is compatible with Series 5 and Series 6 new generation Safety Warning Warning: Do not use the device near water. Pay attention to correct cleaning and care to avoid skin irritation and bacterial growth. SIMPLE REPLACEMENT: easily attach your new shaver head - just by clicking it on Braun Series 5 Replacement Head Aazon.co: Braun Series 5 Replaceent Head - 52B Electric Shaver QUALITY CRAFTSMANSHIP: 100% made in Germany and compatible with Series 5 and Series 6 (new generation 50-XXXXX/60-XXXXX) electric shavers