Requires LOCATOR FIXED® Seating and Removal Tool - 2000-89 and LOCATOR® Systems CORE Tool - 1000-96E-L. LOCATOR FIXED® Denture Attachment Housing (4 pack) - 2000-91-L4, White Block Out Spacer, 20 Pieces - 1000-92S-L20, LOCATOR FIXED® Insert, Four Unit (Green) (2 pack) - 2000-92G-L2. System: LOCATOR FIXED®