5 Piece Dental Osteotomes Straight Set Includes: 2.6mm Osteotome used to carry and place bone grafting material into site of the elevated sinus floor. 3.1mm Osteotome used to condense bone material under the sinus. 3.8mm Osteotome used to carry and place bone grafting material into site of the elevated sinus floor. 4.5mm Osteotome used for lateral bone condensation for elevation of the sinus floor. The angle assists with posterior access. 5.0mm Osteotome used for lateral bone condensation for elevation of the sinus floor. The angle assists with posterior access.