GREAT QUALITY - Crafted with superior and safety metal. Stud material is cubic zirconia andamp surgical steel. Will not infect the wound after finishing punching your ear. HOW TO USE - Disinfect the ear and ear studs with alcohol pad, mark on the ear, hold the ear piercing tool and alignment the mark, press the ear piercing tool vigorously and remove the ear piercer after the needle seat is detached. Do not remove the ear studs immediately after piercing the ear. UNIQUE DESIGN - Made by professional medical devices manufacturer to eliminate the possible cross-infection and inflammation while ear piercing. Each unit combines self-destroying ear-piercing gun with a built-in ear stud. WIDE APPLICATION - Suitable for professional perforation and home perforation. Notice: this is a self-destroying "One Time" use kit, please do not "Try" or "Test" by pressing it down.