Abstract: A rotatable grinding tool (1) comprising a disc-like body (2) defining an intended direction of rotation (D), in which the grinding tool (1) is rotatable about a central axis (A) of the disc-like body (2), and a front side (3) intended to face a surface to be grinded, and a back side (4) opposite to the front side. The grinding tool (1) further comprises, on the front side (3) of the body (2), a plurality of teeth (5) each extending radially along said front side (3), wherein said teeth (5) being arranged spaced apart from each other. Particularly, the teeth (5) are formed integral with the body (2).

Abstract: The disclosure relates to a guide (1) for guiding an inflatable bladder (2) within a pipeline (3). The guide (1) comprises roller units (6) for supporting the guide (1) against an inner wall of a pipeline (3), at least one of which roller units (6) being supported on a roller bracket (5), in turn arranged on an attachment rail (7) allowing said roller bracket (5) to be movable between different positions on the bracket rail (7), so as to accommodate for various pipeline (3) dimensions. At least one roller unit has a limited travel (T), while a biasing member (8) is configured to bias the roller unit (6) with a limited travel (T) outwardly with respect to the central axis (C) along the limited travel (T). A bladder assembly (10) is also disclosed.