A vacuum-powered rotary tool comprising: a housing having a nose portion and a main body portion, the housing defining at least one air flow channel for guiding a flow of air within the housing, the at least one air flow channel including an air flow inlet located in the nose portion of the housing and at least one air flow outlet located in the main body portion of the housing, the main body portion of the housing being configured to be connected to a vacuum source for generating the flow of air in the at least one air flow channel; a pneumatic drive system enclosed within the housing in the air flow channel and including an output shaft, the output shaft including a tool holder that extends from the nose portion of the housing and is configured to retain a working tool, the pneumatic drive system being configured to use the flow of air in the air flow channel to drive the output shaft to rotate, the tool holder being configured to rotate with the output shaft and defining a working space in front of the nose portion of the housing where the working tool performs work while being rotated; and a foot attachment removably attached to the nose portion of the housing, the foot attachment having a shroud portion that extends from the nose portion of the housing and surrounds the working space, wherein air is drawn into the at least one air flow channel via the air flow inlet in response to the vacuum source generating the flow of air in the at least one air flow channel, wherein the air inlet is in fluid communication with the working space such that the air flow inlet draws air into the at least one air flow channel from the working space, the rotary tool being characterised in that the shroud portion includes at least one tangential air flow inlet for guiding an air flow into the working space from outside of the shroud portion as air is being drawn into the at least one air flow channel via the air flow inlet, and wherein the at least one tangential air flow inlet is configured to generate a vortex within the working space when the flow of air is being generated by the vacuum source. a housing having a nose portion and a main body portion, the housing defining at least one air flow channel for guiding a flow of air within the housing, the at least one air flow channel including an air flow inlet located in the nose portion of the housing and at least one air flow outlet located in the main body portion of the housing, the main body portion of the housing being configured to be connected to a vacuum source for generating the flow of air in the at least one air flow channel; a pneumatic drive system enclosed within the housing in the air flow channel and including an output shaft, the output shaft including a tool holder that extends from the nose portion of the housing and is configured to retain a working tool, the pneumatic drive system being configured to use the flow of air in the air flow channel to drive the output shaft to rotate, the tool holder being configured to rotate with the output shaft and defining a working space in front of the nose portion of the housing where the working tool performs work while being rotated; and a foot attachment removably attached to the nose portion of the housing, the foot attachment having a shroud portion that extends from the nose portion of the housing and surrounds the working space, wherein air is drawn into the at least one air flow channel via the air flow inlet in response to the vacuum source generating the flow of air in the at least one air flow channel, wherein the air inlet is in fluid communication with the working space such that the air flow inlet draws air into the at least one air flow channel from the working space, the rotary tool being characterised in that the shroud portion includes at least one tangential air flow inlet for guiding an air flow into the working space from outside of the shroud portion as air is being drawn into the at least one air flow channel via the air flow inlet, and wherein the at least one tangential air flow inlet is configured to generate a vortex within the working space when the flow of air is being generated by the vacuum source.