This is the plate that has pockets milled to contain the cavities, or in the case of a round part the bored holes. It is located directly under the top clamp plate when the mold is in the storage position. When the mold is in the open position, it is the plate that will be visible when looking at the stationary side of the press. It also has the topside runner milled in if the mold is a cold runner. It will have waterlines drilled in it, contain the male taper lock pockets, and the leader pins holes. Vents and vent reliefs are usually located on the face of this plate for easy access for cleaning when required.