Abstract: The apparatus is used in grind, polish or clean etc, the surfaces of an object such as a pipe. The apparatus comprises a rotary tool (1) having an axis of rotation, at least one wall and a chamber defined between the axis and the wall fore receipt of the object, and a conditioning member for contact with said surface of said object, the conditioning member (14) projecting into said cavity and being fixed to said wall so that it rotates therewith. The apparatus may comprise means for connection (8) to a rotation actuator and may be connected to a centrally located bore member (1) connected to a further plurality of conditioning members. Additionally, means to bias the conditioning members towards the surface to be conditioned may be included comprising compressed air and/or the magnetic attraction of a magnetic material embedded in the main body of the apparatus to the surface to be conditioned.