2 Hole 4 Hole Anti Infection Dental Disposable High Speed Handpiece for Individual Patient Can Use in The Dental Unit Inquire Product Description OSA-F205B Holes: 2 hole/4 hole Feature: anti-infection Usage: 1. dental disposable high speed handpiece for individual patient 2. can use in the dental unit 3. a quality which can used in the dental unit,no need to buy coupling