A shear plate for application to the outer end portion of a ferrule to be cast into a concrete component such as a wall panel, the shear plate having an outer portion engageable with the ferrule and, beyond the outer portion, a portion shaped to incline away from the adjacent surface of the concrete component to which the outer end of the ferrule is to be exposed. The shear plate enables the ferrule to be situated close to an edge of the component in a situation in which it will be subjected to shear loading in a direction towards that edge.