DIYUK Heavy-Duty Metal Molly Bolt Cavity Wall Anchor M6x36mm - Pack of 2

A true mechanical-expansion anchor - the ribbed steel sleeve flares open behind the board as it is set, unlike a plastic push-fit plug that only grips by friction. The expanded legs spread the load across a wide area on the back of the board, cutting down on point-loading and pull-through. Small teeth under the flange bite into the board face, stopping the anchor from spinning as the screw is driven home. The fixing screw is removable and reusable, so a fitting can come down and go back up without the anchor dropping into the cavity. White zinc-plated carbon steel; available in M4, M5 and M6 across seven lengths.