Amazon.com: 2+1 Heavy Duty 304 Stainless Steel Swivel Ring Double Ended Swivel Eye Hook with SUS304 Snap Hooks for Web Tree Swing, Therapy Swing, Aerial Dance, Swing Spinner Hanger, Reliable and Safe (
Amazon.com: M10 Eye Bolt 304 Stainless Steel Heavy Duty Lifting Ring Bolt Screws Pack of 5 : Industrial & Scientific
Amazon.com: GlobalMa 2" Tri Clamp Clover with Single Pin,Heavy Duty Sanitary Tri-clamp for 64MM OD Ferrule Flange,SS SUS 316 Stainless Steel : Industrial & Scientific