A connector for interconnecting tubular profiles in their longitudinal direction, the connector having an extension along a longitudinal first axis, an extension along a transverse second axis and an extension along a third axis, which third axis is perpendicular to the first axis and the second axis, the connector comprising: - a first connector end, - a second connector end arranged opposite the first connector end along the first axis, - an intermediate part arranged between the first and second connector ends (2, 3), - first and second engaging elements (5, 6) having an extension along the longitudinal first axis and arranged opposite each other, wherein the first engaging element is movably arranged relative the second engaging element in the transverse second axis direction between a non-expanded state and an expanded state of the connector, - at least one expansion bracket arranged to be in contact with the first and second engaging elements (5, 6), wherein the expansion bracket comprises at least one distal part arranged at a first distance (a) from the intermediate part in the longitudinal first axis direction and at least one proximal part arranged at the intermediate part, - a tensioner arranged at the intermediate part and substantially extending in the transverse second axis direction, which tensioner is engaged with the proximal part of the expansion bracket and arranged to move the proximal part in the transverse second axis direction so that the expansion bracket pivots, whereby the at least one distal part gets an increased extension along the transverse second axis direction when the proximal part is moved in a first direction along the second axis direction thereby pressing the first and second engaging elements (5, 6) away from each other, characterized by that the second engaging element of the connector is U-shaped and comprises a first shank and a second shank both extending in direction towards the first engaging element, the first shank comprises at least a first recess and the second shank comprises at least a second recess, and the first engaging element is connectable between the first and second shanks (6a, 6b) by that the first engaging element comprises a first protrusion facing the first shank and arrangeable in the first recess of the first shank and a second protrusion facing the second shank and arrangeable in the second recess of the second shank, wherein the respective protrusion (5aa, 5bb) of the first engagement element is arranged to at least partly leave the corresponding recess (6aa, 6bb) of the second engaging element in the transverse second axis direction when the at least one distal part of the expansion bracket presses the first and second engaging elements (5, 6) away from each other, whereby the respective protrusions (5aa, 5bb) presses the respective first and second shanks (6a, 6b) of the second engaging element away from each other in the third axis direction. - a first connector end, - a second connector end arranged opposite the first connector end along the first axis, - an intermediate part arranged between the first and second connector ends (2, 3), - first and second engaging elements (5, 6) having an extension along the longitudinal first axis and arranged opposite each other, wherein the first engaging element is movably arranged relative the second engaging element in the transverse second axis direction between a non-expanded state and an expanded state of the connector, - at least one expansion bracket arranged to be in contact with the first and second engaging elements (5, 6), wherein the expansion bracket comprises at least one distal part arranged at a first distance (a) from the intermediate part in the longitudinal first axis direction and at least one proximal part arranged at the intermediate part, - a tensioner arranged at the intermediate part and substantially extending in the transverse second axis direction, which tensioner is engaged with the proximal part of the expansion bracket and arranged to move the proximal part in the transverse second axis direction so that the expansion bracket pivots, whereby the at least one distal part gets an increased extension along the transverse second axis direction when the proximal part is moved in a first direction along the second axis direction thereby pressing the first and second engaging elements (5, 6) away from each other,