A shroud for a dust extractor comprising a body portion and an engaging portion; wherein the body portion comprises: a tubular housing (210, 214) having a first inlet formed at one end defining a first opening and a second inlet formed at the other end defining a second opening, wherein the tubular housing forms a passageway which connects the two openings (204, 206), and which comprises a longitudinal axis; wherein the engaging portion comprises: a tubular housing which connects at one end to a side of the body portion and which forms a passageway which comprises a longitudinal axis and which extends the length of the tubular housing of the engaging portion, the tubular housing, at one end, connects to a third opening formed through the wall of the body portion to connect the passageway of the engaging portion with the passageway of the body portion and at the other end, remote from the body portion, comprises a third inlet defining a fourth opening; wherein a top wall is resiliently deformable in order to bend in a direction perpendicular to the longitudinal axis of the engaging portion and comprises a recess formed on one side of the top wall which is capable of engaging a ridge formed on a dust extractor, when the shroud is mounted on a dust extractor, to lock the shroud to the dust extractor; characterised in that there is provided a seal mounted in the second inlet of the body portion, the outer edge of the seal being attached to the periphery of the second inlet, the seal projecting radially inwardly towards the longitudinal axis of the tubular body; wherein at least a part of the wall which forms the third inlet of the engaging portion extends further away from the rest of the wall which forms the third inlet to form the top wall; wherein the recess is formed on the side of the top wall which faces the longitudinal axis of the engaging portion. wherein the body portion comprises: a tubular housing (210, 214) having a first inlet formed at one end defining a first opening and a second inlet formed at the other end defining a second opening, wherein the tubular housing forms a passageway which connects the two openings (204, 206), and which comprises a longitudinal axis; wherein the engaging portion comprises: a tubular housing which connects at one end to a side of the body portion and which forms a passageway which comprises a longitudinal axis and which extends the length of the tubular housing of the engaging portion, the tubular housing, at one end, connects to a third opening formed through the wall of the body portion to connect the passageway of the engaging portion with the passageway of the body portion and at the other end, remote from the body portion, comprises a third inlet defining a fourth opening; wherein a top wall is resiliently deformable in order to bend in a direction perpendicular to the longitudinal axis of the engaging portion and comprises a recess formed on one side of the top wall which is capable of engaging a ridge formed on a dust extractor, when the shroud is mounted on a dust extractor, to lock the shroud to the dust extractor; characterised in that there is provided a seal mounted in the second inlet of the body portion, the outer edge of the seal being attached to the periphery of the second inlet, the seal projecting radially inwardly towards the longitudinal axis of the tubular body; wherein at least a part of the wall which forms the third inlet of the engaging portion extends further away from the rest of the wall which forms the third inlet to form the top wall; wherein the recess is formed on the side of the top wall which faces the longitudinal axis of the engaging portion. a tubular housing which connects at one end to a side of the body portion and which forms a passageway which comprises a longitudinal axis and which extends the length of the tubular housing of the engaging portion, the tubular housing, at one end, connects to a third opening formed through the wall of the body portion to connect the passageway of the engaging portion with the passageway of the body portion and at the other end, remote from the body portion, comprises a third inlet defining a fourth opening; wherein a top wall is resiliently deformable in order to bend in a direction perpendicular to the longitudinal axis of the engaging portion and comprises a recess formed on one side of the top wall which is capable of engaging a ridge formed on a dust extractor, when the shroud is mounted on a dust extractor, to lock the shroud to the dust extractor; characterised in that there is provided a seal mounted in the second inlet of the body portion, the outer edge of the seal being attached to the periphery of the second inlet, the seal projecting radially inwardly towards the longitudinal axis of the tubular body; wherein at least a part of the wall which forms the third inlet of the engaging portion extends further away from the rest of the wall which forms the third inlet to form the top wall; wherein the recess is formed on the side of the top wall which faces the longitudinal axis of the engaging portion.