... TEST CERTIFICATE lifting socket 1) Product: Lifting socket,lifting insert,bend and waved socket, transport socket,flat socket ,socket ... with bar and so on.2) Diameter: M / RD 12 - 36mm 3) Length: 40 - ... stainless 304/316, ST52.36) Surface: plain, galvanizedLifting socket,lifting insert,bend and waved socket, transport socket,flat socket concrete lifting ...