The basis for a successful implantation is the precise and atraumatic preparation of the osseous implant site by using perfect coordinated drill instruments. The BoneTrust® drills do not require inner cooling and thus, can be safely and easily cleaned in the benefit of a fast, secure and simple preparation. They have a constant color coding and are characterized by an optimal cutting performance, even in cases of reduced rational speeds. Due to their special geometry, sufficiently large and vital bone chips can be obtained. The groove marks, which provide depth information, can be well read in all surgical situations due to a special matting procedure. Optionally, color-coded drill stops are available for the extension drills.