Designed to anchor insulation material to concrete and masonry substrate materials. One piece impact resistant copolymer. Large diameter head Minimum embedment depth marker. Diameter mm: 8.0, Length mm: 70, Drill Hole Dia. mm: 8.0, Min Drill Hole Depth mm: 50, Max Fixture Thickness mm: 30. Please Note: Due to geographical locations we are unable to deliver to Highlands.