Quick view Manta Ray® MR-1 1"-8 Earth Anchor MR-1 1"-8. Thread Size: 1"-8 UNC Material: Head & Shackle: Ductile Iron, 40 KSI Yield Rivet Pin: Carbon Steel Finish: Hot Dip Galvanized Per ASTM A123 Length: 14.4 IN Mechanical... $147.94 Add to Cart