A warding file is similar to

Flat file but uniform in width

Hand file but narrow in width

Flat file but thinner in thickness

Flat file but thinner and uniform in thickness

MT-1 taper

MT-2 taper

MT-3 taper

MT-4 taper

Aluminium oxide wheel is used

Silicon carbide wheel is used

Diamond wheel is used

Corundum wheel is used

Thin section metal

Soft metals

broad section metals

Non-metals

to thread the hole with full threads up to the bottom

to start the threads

after the first (rougher) tap

to form the threads easily