It fits over the MCB toggle and is held in place by tightening the internal grub screw with a small flathead screwdriver; once tight and secure, insert a safety lock or multi-lock hasp with a shackle up to 7mm diameter.
Fits most standard MCBs with a toggle up to 6mm deep.
Dimensions
Width 8mm, Hole 7.5mm, Toggle depth 6mm, Length 25mm
