The invention relates to a surgical tool for performing surgery on a bone, particularly for reinforcing the bone in a miniinvasive manner, comprising: a first and a second element (10, 20), wherein the two elements (10, 20) each comprise a shell (100, 200) defining a hollow space (101, 201) of the respective element (10, 20), wherein the second element (20) is designed to be inserted into the hollow space (101) of the first element (10), a guiding element (30), wherein the guiding element (30) comprises a first free end (31), and wherein the guiding element (30) is designed to be inserted into the hollow space (201) of the second element (20) with said first free end (31) of the guiding element (30) ahead, and wherein the guiding element (30) is designed to be drilled into said bone with its first free end (31) ahead so as to anchor said guiding element (31) in said bone, and a drill (40), which drill (40) is designed to be put over the guiding element (30) in a drilling state, in which drilling state the first element (10) encompasses said drill (40) for tissue protection.
