High Quality the nail forms is thick enough and self-adhesive with adhesion, it can be fixed on your finger to prevent instability when you are applying the poly nails gel or nail extensions. Wide Application: usable for poly nail gel, acrylic nails art extension, acrylic nail builder, great for nail art DIY lovers, learners, beginners, nail professionals, for sculpting French , stiletto, almond, coffin, ballerina and other nail tips guide.