Arrangement for attaching a bar of a hand-held motor driven tool, such as a chain saw, to a body of the tool, the arrangement comprising: a body at least one first engagement means, having a first part, securely arranged to the body, and a second part extending from the body, the second part having an engagement portion for engaging a second engagement means (5, 15); a cover portion (4, 14) adapted to bear against the bar such that the bar is arranged between the cover portion (4, 14) and the body; the arrangement further comprising at least one second engagement means (5, 15), captively attached to the cover portion (4, 14), wherein the second engagement means is adapted to thread engage the engagement portion of the first engagement means for securing the bar between the cover portion (4, 14) and the body, the second engagement means (5, 15) having a rotation axis; wherein the second engagement means is arranged to move in thread engagement to a position at a first distance along the engagement portion of the first engagement means, in a direction of the rotation axis of the second engagement means (5, 15), wherein when the first and second (5, 15) engagement means are not engaged, the second engagement means (5, 15) is captively attached to the cover portion (4, 14) in such a way that it is movable to a position at a second distance relative the cover portion (4, 14) in a direction of the rotation axis of the second engagement means (5, 15), wherein the second distance is larger than the first distance, wherein the second engagement means comprises a holder portion and an engagement portion, characterized in that said engagement portion of said second engagement means is rotatably attached to said holder portion. a body at least one first engagement means, having a first part, securely arranged to the body, and a second part extending from the body, the second part having an engagement portion for engaging a second engagement means (5, 15); a cover portion (4, 14) adapted to bear against the bar such that the bar is arranged between the cover portion (4, 14) and the body; the arrangement further comprising at least one second engagement means (5, 15), captively attached to the cover portion (4, 14), wherein the second engagement means is adapted to thread engage the engagement portion of the first engagement means for securing the bar between the cover portion (4, 14) and the body, the second engagement means (5, 15) having a rotation axis; wherein the second engagement means is arranged to move in thread engagement to a position at a first distance along the engagement portion of the first engagement means, in a direction of the rotation axis of the second engagement means (5, 15), wherein when the first and second (5, 15) engagement means are not engaged, the second engagement means (5, 15) is captively attached to the cover portion (4, 14) in such a way that it is movable to a position at a second distance relative the cover portion (4, 14) in a direction of the rotation axis of the second engagement means (5, 15), wherein the second distance is larger than the first distance, wherein the second engagement means comprises a holder portion and an engagement portion, characterized in that said engagement portion of said second engagement means is rotatably attached to said holder portion.