Philips Genuine Norelco HQ8 Dual Precision Shaver Replacement Heads

Fits Product Types: 7110X,7115X,7125X,7140XL,7145XL,7150X,7180XL,7183XL,7240XL,7260XL,7310XL,7315XL,7325XL,7340XL,7345XL,7350XL,7360XL,7380XL,7735X,7737X,7775X,7800XL,7810XL,8831XL,8845XL,8846XL,8867XL,8881XL,8892XL,8894XL,AT750,AT751,AT890,AT891,PT710,PT715,PT720,PT725,PT730,PT735,PT860,PT870 Here are the steps for replacing the shaving heads.  1. Open the shaver by pressing the "release" button;  2. Remove the retaining rings by turning them counterclockwise;  3. Take out the old shaving heads and carefully insert replacements; check that the heads align exactly in the setting;  4. Replace the retaining rings and secure them by turning the lock clockwise;  5. When you close the shaving head properly, you will hear it click into place.