The Crosby S-317A 1/2" (often labeled under the manufacturer catalog code CROS317A1/2 or stock sequence) refers to a 1/2-inch Forged Alloy Steel Hoist Hook. Forged by Kito Crosby, this heavy-duty rigging component is quenched and tempered, built explicitly to handle critical vertical lifting and pulling applications with Grade 80 or Grade 100 alloy chain slings.>