Single acting, spring return manifold mounted cylinders that can operate up to 150psi pneumatic. Features a trepan fluid inlet for porting, in which the cylinder is pocketed into a hole to align the port with the user’s assembly. A spherical rod end allows the cylinder to push, without being fixed to the object being pressed. Screws are fed through the rod-end side of the cylinder and screw into the user’s assemble, to compress the trepan fluid-inlet O-ring around a 7/64 diameter fluid passageway.