A system for preparing and/or performing a dental implant placement, comprising: - a first instrument configured to produce or machine a bore in a jaw bone and/or in a mucous membrane surrounding the jaw bone, wherein the first instrument is formed as a drilling tool, countersinking tool, finishing tool, reaming tool, tapping tool or implant insertion instrument and comprises a first shank, a first stop element and a first machining tip arranged on the end face of the first shank, tapping tool or implant insertion instrument and has a first shank, a first stop element and a first machining tip arranged on an end face of the first shank, the first stop element projecting radially from the first shank and comprising a first stop surface, - a second instrument configured to produce or machine the bore in the jaw bone and/or in the mucous membrane or to insert a dental implant into the bore, wherein the second instrument is formed as a drilling tool, countersinking tool, finishing tool, reaming tool, tapping tool or implant insertion instrument and comprises a second shank, a second stop element and a second machining tip arranged on the end face of the second shank, the second stop element projecting radially from the second shank and comprising a second stop surface which differs in shape and/or size from the first stop surface, and wherein the second stop element is arranged fixedly on the second shank. - a guide device which can be positioned directly or indirectly on at least one tooth, the jawbone and/or the mucous membrane and which comprises at least one sleeve serving to guide the first and second instruments (12, 14) during the production and/or processing of the bore and having a through-opening extending along a longitudinal axis, through which the first instrument and the second instrument can each be guided, wherein the sleeve comprises a first counter-stop surface corresponding to the first stop surface and a second counter-stop surface corresponding to the second stop surface, and wherein the second counter-stop surface is arranged offset along the longitudinal axis relative to the first counter-stop surface, characterized in that the first stop element is arranged fixedly on the first shaft. - a first instrument configured to produce or machine a bore in a jaw bone and/or in a mucous membrane surrounding the jaw bone, wherein the first instrument is formed as a drilling tool, countersinking tool, finishing tool, reaming tool, tapping tool or implant insertion instrument and comprises a first shank, a first stop element and a first machining tip arranged on the end face of the first shank, tapping tool or implant insertion instrument and has a first shank, a first stop element and a first machining tip arranged on an end face of the first shank, the first stop element projecting radially from the first shank and comprising a first stop surface, - a second instrument configured to produce or machine the bore in the jaw bone and/or in the mucous membrane or to insert a dental implant into the bore, wherein the second instrument is formed as a drilling tool, countersinking tool, finishing tool, reaming tool, tapping tool or implant insertion instrument and comprises a second shank, a second stop element and a second machining tip arranged on the end face of the second shank, the second stop element projecting radially from the second shank and comprising a second stop surface which differs in shape and/or size from the first stop surface, and wherein the second stop element is arranged fixedly on the second shank. - a guide device which can be positioned directly or indirectly on at least one tooth, the jawbone and/or the mucous membrane and which comprises at least one sleeve serving to guide the first and second instruments (12, 14) during the production and/or processing of the bore and having a through-opening extending along a longitudinal axis, through which the first instrument and the second instrument can each be guided, wherein the sleeve comprises a first counter-stop surface corresponding to the first stop surface and a second counter-stop surface corresponding to the second stop surface, and wherein the second counter-stop surface is arranged offset along the longitudinal axis relative to the first counter-stop surface, characterized in that the first stop element is arranged fixedly on the first shaft. wherein the sleeve comprises a first counter-stop surface corresponding to the first stop surface and a second counter-stop surface corresponding to the second stop surface, and wherein the second counter-stop surface is arranged offset along the longitudinal axis relative to the first counter-stop surface, characterized in that the first stop element is arranged fixedly on the first shaft.