Being a reputed company in the industry, this is our responsibility to offer standard quality Runner Locking Pins.Runner Locking Pins function is to pull runner when ejection begin still in top plate, if runner adhere in stripper plate, the robots or operator will difficult to take the runner, because no ejection system for runner in stripper plate.when design the runner system and ejection system for runner in 3 plate type of mold you should use those mold accessories.