The invention refers to an aiming guide system (20) for a surgical tool with a hole (4) in a bone plate (90). The aiming guide system (20) comprises an arm portion (10) having a longitudinal axis, top (8) and bottom surfaces (7), and first and second ends, and bores (12) extending through the arm portion (10) and a tool guide (60) having a longitudinal axis (A-A) and a channel (65) in the direction of the longitudinal axis (A-A) of the tool guide (60). The tool guide (60) having a head (61) and a sleeve portion (62), the head (61) being positioned at least in part within said bore (12), the channel (65) being centered with respect to the sleeve portion (62), and the sleeve portion (62) and channel (65) being eccentric with respect to the head (61). The bore (12) and tool guide (60) are configured and adapted such that the tool guide (60) is received in the bore (12) in at least two different preset positions which locates the channel (65) in at least two different hole positions.
