Coren PS Sterile Disposable Ear Piercers. It allows you the opportunity to provide your patients with quick, painless and safe earpiercing. Coren PS is a ready-to-use, one step ear piercing system that is laboratory tested. Hypoallergenic studs and clasps are individually sealed with disposable ear piercer, avoiding any concern of cross contamination. All are delivered sterile and ready to pierce with. CorenPS Earpiercer come with 6 pairs (12 earrings) to a box. Simple Procedure: Close gently to position piercer at the exact location desired and apply pressure gradually until Coren "snaps" instantly releasing the ear stud, piercing the lobe and automatically attaching the removable clasp. 6PR/BX. Priced per box.