ITEM NAME:5mm D Bow Shackle Screw Pin Pin Sleeve Rig Jeep, 304 Stainless Steel img *{margin:0;padding:0;.Stainless Steel 304 D Shackle, also known as chain shackles, d shackles, both referring to the "D" shape design. Narrower than a bow or anchor shackle and generally have a threaded pin or pin close. 1 piece D-shape shackle.