RCD 63A CIRCUIT BREAKER
Merlin Gerin Multi 9 25019 CB C60H C63A + Vigi C60 RCD 300mA 26729 4 in
The Dykem 80000 model works nicely for marking drill points on hardened steel.
Circuit Breaker Small 6Way Leakage Protection 63A 30mA RCD+4MCB
A nice touch with this unbranded generic item is the protective coating it has.
GARO G-RCD-63/2/03/A RCD 63A CIRCUIT BREAKER (BR6.6B23)
A nice touch is the tear-resistant cover on most RITE IN THE RAIN notebooks.