Abstract: A tool for removing burrs from around both the upper and lower openings of a drilled hole 12 in a flange F comprising a collar 2, a rod-shaped main body R slidable within said collar 2 and projectable and retractable with respect to said collar 2, an upper tip 10 on the outer wall of said collar 2, the back end of said tip 10 protruding inwardly from the inner wall of said collar 2 and engaging slidably into a key flute 7 in the main body R, a lower tip 1 on the side of the lower end of the main body R and protruding laterally thereof, coiled spring 3 interposed between the the coller 2 and a washer 5 on the lower face of an adjusting nut 6 screwed at the main body R to urge the main body R into the retracted position and to maintain both the tips 1, 10 in predeterminate pressure engagement with the drilled hole 12, and a handle 4 to rotate both the main body R and the collar 2 simultaneously, whereby to enable to remove burrs from around the upper and lower openings of the drilled hole 12.