Metal cavity fixing 1200203 (set of 25 pieces) with hook, length 50 mm. Large captive toggle. Suitable for mounting in walls and ceilings made of board material Can be used in 10-26 mm board thickness Material: Toggle and collar of zinc, hook and spring of steel Installation: Drill a hole with a diameter of 10 mm. Fix the toggle in the collar and push the cavity fixing in with the aid of the screw Push the screw until the springloaded bar flips over and remove the screw to mount the fixture