Metalwork of a window with a fixed frame (2) and a leaf (3) as well as a control of the metalwork to open and close the leaf (3) which can turn round a vertical axis (X-X') or which can tilt round a horizontal axis (Y-Y') depending on the position of the control (15), whereby a scissor mechanism (29) is provided with a main arm (30) which can freely rotate in relation to the leaf (3) in order to make the window (1) tilt and which can be locked in relation to the leaf (3) in order to make the window (1) turn by means of a locking device with two coupling elements, a coupling element (38) is provided on the leaf (3) on a slide lath (28) which can shift over an outer perimeter (8) of the leaf (3) by means of the control (15) and a coupling element (37) on the main arm (30) is made as a rotating arm (39) on which has been provided an eccentric gudgeon (37) which can work in conjunction with a complementary female coupling element (38) on the slide lath (28), which arm (39) has been provided on the main arm (30) in such a way that it can turn half a turn between two positions that can be locked, corresponding to a turn tilt or a tilt turn type of metalwork (6) respectively.