Installation body for door and/or window handles and handle arrangement with one installation body

An installation body assembly for door and/or window handles comprising:

• a base body having one centrally arranged recess and at least two passage holes for accommodating fastening screws therein, the base body a top side and an opposite bottom side;
• a covering element that is rotatably arranged on the top side of the base body, the covering element having a first rotary position with respect to the base body in which the covering element covers the base body and a second rotary position with respect to the base body in which the covering element allows access to the passage holes in the base body;
• and
• a lower covering part located on the bottom side of the base body;
• wherein the covering element and the lower covering part surround the base body when the covering element is in the first rotary position;
• wherein the covering element is rotatably secured on the base body with a flange ring having a flange edge that is in contact with a top side of the covering element in the area of the opening in the covering element;
• wherein the flange edge of the flange ring has a flat front surface;
• wherein the front surface of the flange ring forms a bearing surface for a handle to be mounted on the installation body;
• and
• wherein a detent ring is inserted into the base body while the flange ring is fixed on the detent ring.