The present invention provides a bone surgical apparatus that includes a unit with a first end and an opposed second end. The first end of the unit includes a female component with an interior dimension and the second end includes a male component having exterior dimension. The female component and the male component are capable of mating. At least one the female and male components also includes an adjustment mechanism with a first position that allows the component to rotate in a both a first rotational direction and a second rotational direction opposed to the first rotational direction, and a second position that prevents rotation of the component in the second rotational direction.
