St. Andrews Cross Neck Rest – Stainless Steel Adjustable Head Support AccessoryErgonomic Support, Precisely Positioned The Neck Rest for the St. Andrews Cross adds an ergonomically shaped head and neck support to the cross, mounted on a sliding sleeve that travels freely along a 50 cm stainless steel rail. The 50 mm standoff positions the support away from the upright, placing it correctly against the back of the neck rather than the back of the head. Slide it to the right height for the person on the cross, and it stays there