The disclosure relates to an assembly for a mower of a mowing or chopping machine, which comprises a tool carrier, which is formed with a carrier disk and which is configured to be mounted rotatably about an axis of rotation to a mower of a mowing or chopping machine; and cutting tools, which are each formed with a cutting blade located radially outwardly to the axis of rotation and a holding section located radially inwardly to the axis of rotation and which are detachably mounted to the carrier disk in an assigned carrier section, wherein the cutting tools are each mounted to the tool carrier by a mounting bolt, wherein the mounting bolt is in each case mounted to the cutting tools in a non-detachable manner. The disclosure furthermore relates to a replacement cutting tool and a mower for a mowing or chopping machine.