Disk tip technology allows stylus to write with precision, like a real pen on your tablet or phone;The plastic disk tip is retractable; this protects the disk from damage during travel;Compatible with any touchscreen phone or tablet;Plastic disk glides effortlessly across your touchscreen device at an angle or upright; taps and toggles with ease;Note: Do not remove the plastic disk unless you are replacing it; the disk remains on the stylus during use. If a replacement tip is needed, they are available and are sold separately on this product page; Amazon #B015F1DZFK