Half

Equal

Double

Triple

Torque wrench

Valve spring lifter

Box spanner

Scraper

Difference in dia measured top to bottom

Difference in dia thrust to non thrust side of cylinder

Difference in dia measured only at top

Difference in dia measured only at bottom

During assembling water pump

During assembling oil pump

During assembling cam shaft

During assembling radiator

Compression gauge

Vacuum gauge

Dial gauge

Depth gauge