The countersink tool SWINGCHAM is being used to countersink holes in metallic as well as nonmetallic parts. It is particularly well suited to work in badly accessible areas. The countersink is freely compliable in two directions. The pressure against the part edge can be set from the robot program. The countersink tip of the SWINGCHAM 110 is freely compliable in all directions thanks to its flexible tool mount (flex coupling).