Bevel gauge
Vernier caliper
Standard wire gauge
Depth gauge
more flexible
more area of cross section
more resistance
more weight
neutral wire of the circuit
phase wire of the circuit
Switch (half wire) of the circuit
earth wire of the circuit
Edison screw type lamp holders
Goliath Edison screw type holder
Swivel lamp holder
Bayonet cap lamp holder
Two way switch
Intermediate switch
Two plate ceiling rose
Three plate ceiling rose