A-P Cross-Hairs Holder is a mounting device for the cross-hairs to the arc. It enables a check of the instrument's placement in relation to the target point in the anterior-posterior orientation. When the Cross-Hairs are mounted on the A-P Cross-Hairs Holder or on the arc axes, the center of the cross-hairs directly coincides with the center-of-arc point. This point is the stereotactic target if the instrument stop is at zero position and the working length of the instrument used is 190 mm.

A-P Cross-Hairs Holder consists of 1 carrier, 1 A-P Holder and 1 Instructions for Use.