The Ball Attachment system offers several advantages over traditional O-ring attachments. It requires less mesial/distal/buccal/lingual space and offers four different levels of retention. The nylon retention inserts can be changed chairside. Includes: (1) Titanium Housing, (3) Female Nylon Inserts - white (more retention), pink (less retention), black (lab processing) and (1) Protective Disk (ref. BCPD, protects tissue during impression making or denture pick-up).