rattail file

rattail file

[′rat‚tāl ′fīl]
(design engineering)
A round tapering file used for smoothing or enlarging holes.
References in periodicals archive ?
Correcting the problem calls for elongating the screw hole in the bridge with a rattail file, and using a mill file to break the leading edge of the bridge at 45 degrees.
It helps to file out the flange inside the coupling with a rattail file so it slides smoothly on the conduit.
Use a round file, called a rattail file, for fitting tight curved profiles, and a combination flat/half round for all other trim (Photo 19).