A circumcision device comprises a base, configured to engage a patient’s body adjacent the patient’s penis, and at least one support arm, extending from the base. A fin section provided between a runner section and a product section is extended from one end part to the other end part of the product section in a direction intersecting a stream direction of molten metal, and includes a fin central section opposed to a biscuit section in the stream direction of the molten metal, and a fin side section on a side of the fin central section. The second connector includes a second connector body, and first and second fixing protrusions.