PART NO 515544. CHAIN HOIST. TOP HOOK OAD: 9" X 7-3/4" X 1-3/4". BOTTOM HOOK OAD: 9" X 7-3/4" X 1-3/4". HOOK OPENING: 2-1/2". HOOK DEPTH: 4". TOP OAD: 16" X 8" X 22". BOTTOM OAD: 20" X 9" X 4".