heavy metal base holds this mechanic at the bottom of the vase or container. Needle holders are usually round, though ovals are also available. They range in size from 1 to 6 inches across. Protruding from the base are sharp, heavy-duty metal prongs, which are spaced closely together to form a tight mass.
While the needle holder should stay in place, occasionally the weight of stems and flowers causes it to move within the vase. Florist stickum, a pliable claylike substance, placed under the needle holder firmly anchors it to the container.
This type of mechanic holds stems in an upright position. Place stems on the prongs, and that is where they stay. Water moves freely into the stems and up into flower heads, keeping them hydrated. Woody flowering branches and hollow-stemmed flowers such as tulips, calla lilies, and gerbera daisies last longest when held in place with a needle holder.