Designed to anchor insulation material to concrete and masonry substrate materials. One piece impa...Designed to anchor insulation material to concrete and masonry substrate materials. One piece impact resistant copolymer.Large diameter headMinimum embedment depth marker"Diameter mm: 8.0Length mm: 50Size L x W mm: N/AMaterial: PlasticFinish: N/ADrill Hole Dia. mm: 8.0Min Drill Hole Depth mm: 50Max Fixture Thickness mm: 10Min Embedment Depth mm: N/A.