This versatile metal cavity fixing is appropriate for many different applications. It is ideal for board building materials - 3 mm to 50 mm thickness. It is designed for good flexibility, high load-bearing capacity and a secure installation. The wide range of applications cover: Pictures, Lighting, Curtain rails, Light shelves and Sub-structures. Further, Metal Cavity Fixing HM works with Gypsum plasterboard, Light building boards, Chipboard and Plywood boards.