Please Note : Please select the appropriate size of stylus pen tip Stylus disc pen tip universal replacement is a multifunctional tool for precise stylus pen touch screen input. It can be used for various sketching, drawing, painting, writing, gaming, etc. on all touch screen devices such as cellphones and tablets, and is also suitable for professionals in the workplace, such as designers, architects, engineers, etc. Stylus disc pen tip, is in size of :7mm/0.28 inch pen head dia, 2mm/0.08 inch hole dia, 15mm/0.59 inch total length Steps of installation:1. Choose a suitable size replacement stylus pen tip; 2. Remove the stylus pen tip that needs to be replaced; 3. After installation, precisely touch screen input The multifunctional universal replacement of touch stylus pen tip has high compatibility and supports all touch screen devices, such as various cellphones, tablets, etc. It is a good replacement for handwriting stylus pen tip; High precision, thin and precise tip, can accurately input on touch screen devices; Durable and wear-resistant; Easy to install and use