A tooth for earthmoving and mining equipment, including a cutting tip; and a mounting portion rearward of the cutting tip, the mounting portion having ‘a cavity therein opening to the rear and including a cone portion extending forward from the rear opening and terminating in a beak portion. The cone portion being defined at least in part by spaced apart upper and lower faces and opposed spaced apart side faces, the upper and lower faces being joined to the side faces by curved corner faces and the opposed upper and lower faces converging towards each other and the opposed side faces converging towards each other away from the rear opening so that the curved corner faces diminish away from the rear opening. The upper and lower faces and the side faces of the cone portion terminating in a beak portion at the front of the cavity, the beak portion being defined at least in part by opposed spaced apart upper and lower faces joined by opposed spaced apart side faces, the upper face, lower face and side faces of the beak portion being contiguous with the upper face, lower face and side laces of the cone portion respectively, and the upper and lower faces of the beak portion being generally parallel and the side faces of the beak portion also being generally parallel and contiguous with a front face of the beak portion.