Bahco 1-230-06-1-2 Round File with Ergonomic Handle, 6-Inch, 33 TPI,SnapOn,1-230-06-1-2" /> Engineering File, Round, 6", 33 Teeth per Inch (TPI) Type of Cut: Bastard Regularly used for filing holes, large fillets, and concave surfaces. File is tapered to a point and has a double cut. Comes with Bi-molded Ergonomic handle.