A rotary power tool comprising: a motor configured to rotate an output shaft; a flexible shaft including a first end operably connected to the output shaft so as to rotate with the output shaft; a handpiece including a handpiece housing, a driven shaft arranged in the handpiece housing and rotationally fixed to a second end of the flexible shaft so as to rotate with the flexible shaft, and a bit holder configured to receive a tool bit, the bit holder being operatively connected to the flexible shaft by the driven shaft so as to rotate with the flexible shaft; and a dust collection system comprising: a vacuum blower configured to generate a negative pressure; a connecting hose defining a first void region fluidly connected to the blower and which has the negative pressure, the connecting hose extending along a first length of the flexible shaft, wherein the connecting hose radially surrounds the first length of the flexible shaft, and wherein the first void region is defined radially between the flexible shaft and the connecting hose; characterized in comprising a nozzle portion defining a second void region fluidly connected to the first void region and which has the negative pressure, the nozzle portion extending along a second length of the handpiece, wherein the nozzle portion includes a nozzle body enclosing the second length of the handpiece, wherein the nozzle body has a first end adjacent the connecting hose and a second end opposite the connecting hose, and wherein the second void region is defined between an inner wall of the nozzle body and an outer surface of the handpiece housing. a motor configured to rotate an output shaft; a flexible shaft including a first end operably connected to the output shaft so as to rotate with the output shaft; a handpiece including a handpiece housing, a driven shaft arranged in the handpiece housing and rotationally fixed to a second end of the flexible shaft so as to rotate with the flexible shaft, and a bit holder configured to receive a tool bit, the bit holder being operatively connected to the flexible shaft by the driven shaft so as to rotate with the flexible shaft; and a dust collection system comprising: a vacuum blower configured to generate a negative pressure; a connecting hose defining a first void region fluidly connected to the blower and which has the negative pressure, the connecting hose extending along a first length of the flexible shaft, wherein the connecting hose radially surrounds the first length of the flexible shaft, and wherein the first void region is defined radially between the flexible shaft and the connecting hose; characterized in comprising a nozzle portion defining a second void region fluidly connected to the first void region and which has the negative pressure, the nozzle portion extending along a second length of the handpiece, wherein the nozzle portion includes a nozzle body enclosing the second length of the handpiece, wherein the nozzle body has a first end adjacent the connecting hose and a second end opposite the connecting hose, and wherein the second void region is defined between an inner wall of the nozzle body and an outer surface of the handpiece housing. a vacuum blower configured to generate a negative pressure; a connecting hose defining a first void region fluidly connected to the blower and which has the negative pressure, the connecting hose extending along a first length of the flexible shaft, wherein the connecting hose radially surrounds the first length of the flexible shaft, and wherein the first void region is defined radially between the flexible shaft and the connecting hose; characterized in comprising a nozzle portion defining a second void region fluidly connected to the first void region and which has the negative pressure, the nozzle portion extending along a second length of the handpiece, wherein the nozzle portion includes a nozzle body enclosing the second length of the handpiece, wherein the nozzle body has a first end adjacent the connecting hose and a second end opposite the connecting hose, and wherein the second void region is defined between an inner wall of the nozzle body and an outer surface of the handpiece housing.