... bolt)have through the "CE" certificate for Europematerial:carbon steel 4.8, 5.8, 6.8, 8.8 ... size: 1/4"-1"bolt length made of carbon steel :from 40mm to 300 mm,bolt length ... made of stainless steel:from 40mm to 400mm,Carbon steel yellow zinc plated wedge anchors ... best service Details Item name Carbon steel yellow zinc plated wedge anchorsmaterial Carbon steel, stainless steel grade 4.8/8.8 ...