The Stayput Rectangle is by far our most popular model. This highly practical, well weighted and balanced piece measures 5cm x 6.8cm, 22mm tall, and weighs 310gms. Useful in vases as well as more adventurous arrangements.A heavy metal flower holder with pins is called a Pinwheel, Kenzan, Stay Put or Spiky Pin Frog. A kenzan is used in Japanese flower arranging techniques called Ikebana. Another expression in Ikebana is the Seika or Shoka style.