[Product Compatibility]: Our HQ8 replacement heads can be perfectly fit for HQ7xxx, HQ8xxx, AT7xx, AT8xx, PT7xx, PT8xx, HQ7100, HQ7180, HQ7200, HQ7240, HQ8445, HQ8850, HQ8870, HQ8880, HQ8882, HQ8890, AT750, AT751. AT890, AT891, PT710, PT715, PT720, PT860, PT870, 7110X, 7115X, 7125X, 7140X, 7180XL, 7183XL, 7240XL, and more. [Smooth Shaving]: The blades of the razor replacement heads adopt a multi-precision cutting system, which gently places each beard in the best cutting position, which can cut up to 30% of the beard than other ordinary blades, leaving your skin smooth Invincible, in the best condition. At the same time, the round head design perfectly protects your skin from scratches. [SUPER LIFT and CUT]: The dual blade system designed for HQ8 replacement heads lifts hairs to cut comfortably below skin level for a closer shaving effect. [Simple Replacement]: It only takes a few minutes to replace the head with a new one; after installation, put a drop of on each nozzle and operate