Contains 8 diamond burs used for small penetration, cavity preparation, undercutting and extension of cavity 520 Small Penetration 527 Cavity Preparation 531 Cavity Preparation with Undercut 567 Larger Cavity Undercutting - 3 functions 541 Extension of Cavity 541C Extension of Cavity 542 Extension of Cavity 537 Extension of CavityCavity Preparation Kit 1 OF EACH BUR 520 527 531 567 541 541C 542 537