Abstract: A locking device for use with first and second mold plates, comprising an upper block including an axial cavity adapted to receive an upper projection end and adapted to be affixed to a first mold plate; a projection having upper and lower projection ends; a base adapted to be secured to a second mold plate, including a longitudinal bore adapted to receive at least one roller actuator assembly and at least one biasing element therein, and a projection receiving bore adapted to receive the lower projection end; at least one roller actuator assembly adapted to mechanically engage the lower projection end; a plurality of biasing elements, each adapted to mechanically engage a roller actuator assembly and a retention plate; and a plurality of retention plates adapted to be secured to the base and retain at least one roller actuator assembly and at least one biasing element within the longitudinal bore.