METAL MUSHRROM FIXING 8MM X 200MM BAG 0F 50- Metal mushroom fixings are designed to anchor insulation material to concrete and masonary substrate material for quick and easy install. Drill an 8mm hole. minimum of 10mm deeper than length of the anchor. These fixings are CE approved and conforms to EN 14566:2008+A1:2009. They are fire rated tested to 120 minutes. The manufacturer strongly recommends that before the anchors are plastered over, the surface of each fixing should be spot painted with a suitable Anti-Corrosive Metal Primer.