Philips Norelco RQ12+ Replacement Head for Series 8000 (SensoTouch 3D) and Arcitec V-Track Precision Blades. The newly designed V-Track Precision Blades collect hair in the optimal cutting position, resulting in a more comfortable shave that鈥檚 30% closer. The blades also self-sharpen to ensure a premium shave day after day. Easy to Clean. Simply remove the top of the shaving head and rinse under running water to clean the heads. Contour Detect Technology. With the unique Contour Detect Technology, each shaving head independently moves in 8 directions to follow your face's every curve. This improved contouring helps cut up to 20% more hair in a single pass.