E26 To E12 candelabra bulb socket base adapters:

E26 To E12 Candelabra Adapters
Rating: 75W-125V
Body: Phenolic
Heat Resistance: 150ºC
RoHS conformed
Material: copper/iron/aluminum
1)E26 To E12 Candelabra Adapters,
2)CE
3)cheap price with good quality
4)fittings: copper, aluminum, iron or zinc alloy

E12 Candelabra Adapters, 12mm diameter, typically found on night light bulbs, chandelier bulbs,
The metal screw itself forms one of the contacts for the circuit. If the lighting system is not correctly wired, or a lamp is plugged into a non-polarized outlet, the metal screw can become energized, presenting an electric shock hazard to anyone attempting to change the lamp.

E26 To E12 Candelabra Adapters are more suitable for small size bulbs
A bulb fully screwed home is more secure than a bayonet fit bulb
Moisture and debris is less likely to contaminate the contacts of a screw base bulb.