Durable Material: The hooks are made of galvanized carbon steel and are harder, more durable and corrosion-resistant than ordinary steel hooks. Wide Use: The sash ceiling hooks are a good choice for plasterboard, wallboard and cavity walls, such as hanging plants, flower baskets, light fixtures, wind chimes, light decors, etc. Profession Design: The metal ceiling hooks are a good choice for plasterboard. The toggle wings can distribute the load over a wider area. They are suitable for mounting the sash hooks on cavity walls. Size: Length: 9 cm; Package Includes: 6 ceiling hooks. More than 10 kg weight capacity per ceiling hook; Hole diameter: 1.45 cm - 1.5 cm to insert the knee pads. Features: Multipurpose on cavity walls: The spring loaded knee pads are intended for installation on plasterboard and such cavity walls. The hooks are made of metal, they are durable and sturdy. The knee pads wings can distribute the load over a wider area, allowing them to be mounted on cavity walls. Home Supply: Classic design ceiling hook that can match the interior of the house. Ceiling hooks can be applied to hanging plants, light fixtures, wind chimes, sheer curtains, and such lightweight decors and objects, suitable for hollow walls. Instructions: Hollow walls or ceiling: Pre-drill a suitable hole, fold the toggle wings, and insert the toggle bolt with the hook attached. Pull back to anchor the wings and tighten. Specifications: Material: Iron, Blue Zinc Plated Length: 9 cm Width: 5 cm Quantity: 6 packs Package includes: 6 x Ceiling Hook