The invention provides a surgical tool (1), e.g. a hand-held tool, for inserting surgical implants in a patient's body, the tool comprising: a main body (2) extending along a longitudinal axis (X-X′) between firstly a working end (3) and secondly a proximal end (4), the main body (2) also presenting an outside surface (5) connecting the working end (3) to the proximal end (4); and a guide cannula (14) arranged within the main body (2) and extending between a distal orifice (15) opening to the outside of said main body (2) at the working end (3), and a rear orifice (16); said surgical tool (1) being characterized in that said rear orifice (16) opens out to the outside surface (5) of said main body (2), and in that said main body (2) presents longitudinal splines (25, 27, 28) projecting from said main body (2) in respective planes extending. radially relative to the longitudinal axis (X-X′). Surgical instrumentation.