You said: CROSBY A3271/4The Crosby A327 1/4" (specifically manufacturing part number 1003764) is a heavy-duty, Grade 80 Alloy Steel Eye Sling Hook. This high-strength industrial rigging hook is engineered for overhead lifting and chain sling assemblies. Note that while the model has been largely succeeded by newer Grade 100 variations like the L-1327, it is still highly sought after as a reliable component for existing legacy lifting setups.