Fixing containers with dovetail foundation matching used. Material: Forged shaft and low alloy casting steel housing. Stainless steel spring. Finish: Hot dip galvanized. Class approval: All items can be supplied with the approval of any classification. Shanghai Shuchang Industry Co., Ltd. is specializes in producing container lashing and fastening devices. The products include: Flush Socket, Dovetail Foundation, Raised Deck socket, Double Plate, Turnbuckle, Lashing Rod, Twist lock, Stacker, Bridge Fitting, D-Ring, Eye Plate, more than sixty kinds of devices. Our products are used in many kinds of shipping containers.