For lubrication

Permit clearance

For expansion

Permit feeding of lapping compound

Diamond

Boron carbide

Silicon carbide

Aluminium oxide

Filing operation

Grinding operation

Chiseling operation

Precision finishing operation

Pitch x no of starts

Lead x no of starts

Pitch x major diameter

Pitch x minor diameter

Dreadnaught file

Pillar file

Warding file

Swiss pattern file