The AHR C Head Restraints are used to restrain the head of internal walls or the internal leaf of a cavity wall. Two angles are clamped together over the block at the head of the wall and then bolted to the underside of the structure. This restraint is designed to clamp around a 140mm block. The SR140 supports a maximum horizontal line load of 1.0kN. To Suit 215mm Block c/w 10mm Hole. Manufactured by ACS Stainless Steel.