All shackle bodies and pins are forged from alloy steel, heat treated and tempered, All shackles are marked with size (inches and millimeters) and working load limit in tons, Bolt, nut and cotter shackles have thread protected ends and are 100% proof tested, Built-in Distortion Detectors (3/8" - 2"), Painted shackles are orange, Standard industry tolerances apply, Ultimate strength equals 5 times working load limit, When ordering, specify galvanized (G) or painted (P), Bail Size: 1 1/2", Working Load Limit: 40000 lb, Material: Carbon Steel, Finish: Galvanized Zinc, Locking Type: Threaded Pin, Height: 4 1/8", Length: 8 7/8", Width: 7, 688", SKU: ORSNO64233