Hedume 60 Pack Practice Fingers Use Tip - Because they are smooth surfaces so please roughin them up with a nail file and eventually fake nails will stick with nail glue in the surface of practice finger's nail and then make DIY practices. Practice Fingers Hedume 60 pack practice fingers are made of good quality plastic, durable enough for your daily using. The size of practice finger is approx. 1.9" * 1.8" * 1.2". Self-adhesive Base Each finger comes with a sticky base so that you can keep it in any surface and stay firmly. Easy to Use Can be used repeatedly, you can directly apply nail polish on the fake nails, no need to stick any extra nails on the practice fingers. Good for Nail Art Training These practice fingers are good for nail art training / practicing. Suitable for nail art beginners, lovers and salon artists.