Yokomo ZC-TB42T 42mm Titanium Turn Buckle (2pcs)  [ZC-TB42T]

That is a special screw manufactured with a reverse thread on a single side associated with screw at both ends, allowing one to adjust the spacing between the components at both ends when rotated in a single direction. Used mainly for upper arms and tie rods, making it very easy to adjust camber and toe angle. There clearly was a stamp in the reverse threaded part associated with center.
Normal kits usually utilize metal turnbuckles, but by changing to titanium, it is possible to somewhat reduce steadily the fat. Particularly, top of the arm is installed high, which plays a part in weight reduction and a diminished center of gravity. It's a component that can improve the quality associated with the device with high accuracy cutting and high accuracy. The space is 42mm and you can find 2 pieces.