Zinc plated, stainless steel & hot dip galvanized internally threaded expansion anchor. Easy to install anchor for uncracked concrete Non-lip for invisible coverage with mortar after use. Ideal for HVAC fixings, sprinkler systems, electrical services, gratings, core drilling machines, false ceiling, Cable trays, suspended ceilings, hand rails & supports, Used with Eye Bolt for safety wire ropes, pipe lines and ventilations.