1) Material: carbon steel 2) Quenched and tempered 3) MBS=5XWLL 4) Finish: H.D.Galv. 5) Sizes: 1/4", 5/16", 3/8", 1/2", H-Lift regular swivel1. size: 1/4"-7/8"2. surface treatment: electric galv. swivel forged,Machine swivel forged regular,forged regular