The Original D Ring, non-locking, large cup with mounting holes and 3 1/8″ X 5/16″ sq shank is made of polished 304 stainless steel
Part Number: F79-LXXSPBXX

Materials:

Stainless Steel 304

Finishes:

Polished & Buffed

Locking/Non-Locking:

Non-Locking