Emtek Petal Knob Set with Tuscany Bronze #12 RosetteAbout the Emtek Petal Knob Set with Tuscany Bronze #12 Rosette A sub category of our Tuscany Bronze collection, the Petal Series encompasses a range of product categories, from keyed knobs to cabinet hardware to sideplates. These items are manufactured using the ancient art of Lost Wax casting and include floral inspired details and a bronze base material.