Easy installation: Just few seconds,twists on or twists off,quality insured,only by hand can you replace or remove the tips.If you feel unsatisfied for any reason,feel free to contact us. Cost Effective: Active pen nib for Dell no easy to worn out,the reality pen-like shape nibs monitory the real pen write on paper,more smoothly in writing or drawing,worry free to replacing the plasitcs tip in 2-3 months,cost saving,recommend wearing the screen protector to achieve the flow like writing experience. Natural Feeling: The active pen tip compatible with dell premier rechargeable active pen – PN7522W with up to 4096 levels of pressure sensitivity and solid and responsive tip technology,provides a natural feeling of writing,sketching and annotating on screen just like on paper. Highly sensitive: The tip can precision control for the fine detail,unique pen tips with the same high pressure sensitive as the original pencil tip,compatible with dell premier rechargeable active pen – PN7522W. Wear-Resistance: The fine rubber tip is clean and smooth,don't scratch your screen protector,durable and long lasting,no scratchen.