Engineer Jet Black File Set TFS-10 (For Second Cut) sharpen it with a medium

sharpen it with a medium (1000-1500) grit stone

and flatten as-needed

Material: High carbon yasugi cutlery steel (blades)

Model number: No

So you have to do a half-turn

Engineer Jet Black File Set TFS-10 (For Second Cut) sharpen it with a mediumENGINEER Inc. produces 3 file sets: each contains 5 different files with a brush for debris cleaning and an exclusive case. TFS 10 is a 6 in 1 set consisting of 5 second cut files and a brush. Jet black coating on files, giving rust resistance and long lasting sharpness. The coating also prevent file teeth from burr clogging, thus easy to clean even after heavy use. Suitable for works include deburring, grinding, plastic model gate polishing,