Medical devices and apparatus, namely, a set of devices and apparatus used by surgeons as a sure-lock front-loading "lumbar retractor set" designed for use by surgeons on the lumbar section of the human spine. Each set includes such medical devices, apparatus, and instruments described more specifically as transverse retractor, lumbar fifteen degree blade with teeth, side-loading locking retractor handle, sacral cutout, macro lumbar disectomy hook, lumbar retractor body for multiple blades, handle crank, adjustable blade holder, front-loading retractor blade holder, and instrument with certain devices made of titanium and the case and other partes made of aluminum and the case designed with holes in order to allow for proper sterilization of tray and includes parts widely used in surgery performed at hospitals and other centers of the human healing arts