A swivelling joint (10, 110, 210) including a first member (12, 112, 212), a second member (14, 114, 214), and at least one bearing member (16, 116, 216); the first member (12, 112, 212) being associated with a first leg (18, 118, 218), the first leg (18, 118, 218) having a longitudinal direction, the first member (12, 112, 212) having a base (22, 122, 222), the base (22, 122, 222) having an outer periphery, the outer periphery being located in a plane, the plane being perpendicular to an operating axis, the operating axis being angled with respect to the longitudinal axis of the first leg (18, 118, 218) at an offset angle; the second member (14, 114, 214) being associated with a second leg (24, 124, 224), the second leg (24, 124, 224) having a longitudinal direction, the first member (12, 112, 212) having a bearing surface (36, 136, 238); the bearing member (16, 116, 216) being connected to the second member (14, 114, 214) by an adjustable connection means (60, 160, 260); the bearing surface (74, 174, 216) of the bearing member (16, 116, 216) being opposed to the bearing surface (36, 136, 238) of the first member (12, 112, 212); the adjustable connection (60, 160, 260) means permitting relative movement of the bearing member (16, 116, 216) and the first member (12, 112, 212) between: a first configuration, wherein the bearing surface (74, 174, 216) of the bearing member (16, 116, 216) and the bearing surface (36, 136, 238) of the first member (12, 112, 212) are in frictional engagement restricting rotational movement of the first member (12, 112, 212) relative to the second member (14, 114, 214), and a second configuration, wherein rotation of the second member (14, 114, 214) relative to the first member (12, 112, 212) is permitted, the swivelling joint being characterized in that: the second member (14, 114, 214) includes an outer wall (48, 148, 248) arranged to surround the base (22, 122, 222) of the first member to define an exterior surface of the swivelling joint (10, 110, 210); the bearing surface (36, 136, 238) of the first member (12, 112, 212) being located internally of the exterior surface of the swivelling joint (10, 110, 210); the bearing member (16, 116, 216) being located within the outer wall (48, 148, 248) of the second member (14, 114, 214). a first configuration, wherein the bearing surface (74, 174, 216) of the bearing member (16, 116, 216) and the bearing surface (36, 136, 238) of the first member (12, 112, 212) are in frictional engagement restricting rotational movement of the first member (12, 112, 212) relative to the second member (14, 114, 214), and a second configuration, wherein rotation of the second member (14, 114, 214) relative to the first member (12, 112, 212) is permitted, the swivelling joint being characterized in that: the second member (14, 114, 214) includes an outer wall (48, 148, 248) arranged to surround the base (22, 122, 222) of the first member to define an exterior surface of the swivelling joint (10, 110, 210); the bearing surface (36, 136, 238) of the first member (12, 112, 212) being located internally of the exterior surface of the swivelling joint (10, 110, 210); the bearing member (16, 116, 216) being located within the outer wall (48, 148, 248) of the second member (14, 114, 214). the second member (14, 114, 214) includes an outer wall (48, 148, 248) arranged to surround the base (22, 122, 222) of the first member to define an exterior surface of the swivelling joint (10, 110, 210); the bearing surface (36, 136, 238) of the first member (12, 112, 212) being located internally of the exterior surface of the swivelling joint (10, 110, 210); the bearing member (16, 116, 216) being located within the outer wall (48, 148, 248) of the second member (14, 114, 214).