B4 safety ring for 4  mm squared and round rods Set of 10

With its fall arrest and anti-theft functions, this discreet and affordable system stops rod hooks from sliding. Square internal anti-rotation hole. Works with all 4mm square picture rails, even painted ones.
Original design in solid brass with a more discreet square hole than standard stop rings. Also works with round rods up to 4 mm in diameter.
Requires a dedicated screwdriver or wrench.

Screws with security drives upon request and by volume.

Registered model in France.