The Fischer Cavity Metal Anchor Hm-s Is A Versatile Cavity Fixing With A Metric Screw For All Panel Building Materials. The Fixing Is Set With The Fischer Installation Pliers Hm-z 1 In The Pre-positioned Installation. The Fixing Is Pulled In The Cavity Against The Board Building Material With The Pliers. In This Case The Expanding Arms Swing Open & Press Onto The Reverse Side Of The Board. Alternatively Assembly Can Be Carried Out Either With A Screwdriver Or A Cordless Screwdriver. The Cavity Metal Anchor Hm-s Is Suitable For Fixing Lights Towel Rails & Curtain Rails.