You are purchasing two 3/8"  bolt on chain grab hooks. The chain hooks are welded to a 3/8" plate with two .55" holes for use with 1/2" bolts. 

Hardware is not included. 

The plate that the chain hook is welded to is 3/8" thick, 4.1" L X  3.15" H. The holes are cut to .55" diameter. These are cnc plasma cut. Please allow for + or - 1/16" tolerance.

Common uses: trailers, loader bucket, rigging.