Decorated key with cloverleaf shaped eye, massive key handle and cruciform beards in beard, key iron iron, hand forged Key with cloverleaf shaped eye (handle) solid key handle (with socket wrench end) Hexagonal collar with different profile edges cross-shaped notches (horizontal and vertical) in key beard and asymmetrical keyhole cross-section hang-and-close work Rotterdam education Academy of Fine Arts and Technical Sciences Cool Coolvest Dijkzigt GJ de Jonghweg City Triangle Blaak Academy of Fine Arts and Technical Sciences Rotterdam.