Adapter, made of brass can be screw-mounted
into Ø 4 mm sockets. The expandable
Ø 4 mm plug of this adapter can be locked
into the socket by tightening the grub
screw. Assembled, the adapter offers complete
touch-proof protection. Ø 4 mm rigid
socket in insulator accepting spring-loaded
Ø 4 mm plugs with rigid insulating sleeve.