A child resistant closure for use with a container having a threaded portion and an axis extending therethrough about which said closure is rotatable may be manufactured from a recyclable material such as tin plate metal or aluminum. The closure includes coaxial and nested inner and outer caps that are axially movable with respect to each other. An axial force causes notches in the outer cap to engage with knurls in the inner cap to transmit torque from the outer cap to the inner cap. Abutment surfaces on the notches interact with the knurls to cause the outer cap and the inner cap to move away from each other in the axial direction when axial force is removed. The knurls may to angled or straight with respect to the axis.