"Handle. The handle shall be solid and rigid made in one piece without hinging joints of any kind. It shall be an isosceles triangle or sector of a circle shaped. The handle shall not stretch appreciably while being thrown. It shall be attached to the wire in such a manner that it cannot be turned within the loop of the wire to increase the overall length of the hammer. The handle may have a curved or straight grip with a maximum width inside of 130mm and a maximum length inside of 110mm. The minimum handle breaking strength shall be 20kN (2000kgf)."