Scale: Unknown. A model of a half killick from St Servan, Ille et-Vilaine, North Brittany consisting of a single thick wooden crescent shaped arm tapering to a point at its ends with two wooden rods dowled through enclosing an oval shaped, almost black, stone which is notched and set at a right angle to the arms. The two rods are then lashed together just above the stone as well as halfway up and at the top forming a parallel wooden shank.