N.Y. Lien Law § 151: Creation of a lien

§ 151. Creation of a lien. Molders shall have a lien, dependent on

possession, on all dies, molds, forms or patterns in their hands

belonging to a customer, for the balance due them from such customer for

any manufacturing or fabrication work, and in the value of all material

related to such work. Such lien shall not have priority over any

security interest in the die, mold, form or pattern that is perfected at

the time the molder acquires the lien. The molder may retain possession

of the die, mold, form or pattern until the charges are paid.