Features: 360 Degrees without Dead Ends. Remove your beard gently, painlessly and more clean, round head design perfectly protect your skin from scratching. Non-Original Philips HQ8 Norelco Replacement Heads Have ultra thin heads with slots to shave long hairs and holes to shave the shortest stubble. Enables smooth skin contact for a comfortable shave. Easy to install Clean the razor before installing Flexing; floating heads follow the contours of your face, allowing for better contact with your skin and for catching more hairs, resulting in a closer, faster shave. Tips: After installation, place a tiny drop of baby oil on each heads and allow shaver to run for 10 seconds. These steps will help to ensure your shaver properly and smoothly running Compatible with: S3110, S3000, S3310/81, S3100, S1560/81, S2100, T710, PT715, ect.(please refer to product pictures) How to use: 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. Specification: Material: steel+plastic Colour: silver Size: 2x0.2cm Package Contents: 3 x Shaver Head