3Pcs Heavy Duty Anchor ISO9001:2000Quality Management System Material:carbon steel ,stainless steelSize:M6,M8,M10,M12,M16Length:55mm,60mm,75mm,90mm,135mmDrill Dia.:12,14,16,20,253PCS Heavy duty shell anchor with Hex Bolt,Hook Bolt,Rod 3PCS Heavy Shell duty anchor