Metal cavity fixing 1200005 (set of 25 pieces) with M4 screw, length 55 mm. Large captive toggle. Suitable for mounting in walls and ceilings made of board material Can be used in 10-26 mm board thickness Color: grey and metal Material: Toggle and collar of zinc, screw and spring of steel Installation: Drill a hole with a diameter of 13 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