The BVSI insulating operating hook fits onto an insulating stick with a B end fitting. It is used to operate (open/close) disconnecting switches.

The hook operating finger is made of composite material strongly reinforced with fibreglass.

The hook body is also made of reinforced composite material.

It fits onto sticks with bayonet fittings and is equipped with an insulating knurled nut for locking it.

This assembly thus consists of an entirely insulating active part reinforced mechanically to withstand the repeated tensile and shear stresses inherent in its use.