The present invention relates to a combination of a primary tool (1) connected to the three-point hitch (2) of a tractor (3) and a secondary tool (4) intended to be hooked on the primary tool (1) by means of two connecting devices (8), each connecting device (8) comprising a hook (10) and a pin (11) intended to be inserted into the corresponding hook (10). The combination is remarkable in that one of the hooks (10) has a positioning ramp (9) substantially horizontal. The present invention also relates to the method of attachment of the secondary tool (4) on the tool (1 primary).
