White wash

Prussian blue

Copper Sulphate

Cellulose lacquer

Steel rule

Try square

Firm joint caliper

Spring joint caliper

Check the flatness

Check the angle

Check the internal dia of the job

Check the eXternal dia of the job

Lead hammer

Claw hammer

Plastic hammer

Ball pein hammer

Torque wrench

Still son pipe wrench

Footprint pipe wrench

HeXagonal socket wrench