Provide increased bearing surface

Prevent the damage to the surface

Distribute even pressure on working surface

Prevent bolt or nut from loosening under vibration

Used for tapered fittings

Can be withdrawn easily

Provides unidirectional torque

Good in high speed application

Pillar file

Riffler file

Barrette file

Warding file

Profile gauge

Snap gauge

Caliper gauge

Progressive gauge

Check the depth of drilled hole

Check the pitch of screw thread

Check the radius of workpiece

Check the gap between the mating parts