10 Galvanized Steel Bow Shackle & Screw Pin Anchor 1/4 Inch Rigging WLL 1000 lbs. Heavy Duty Steel Shackle with Screw Pin. This premium heavy duty Galvanized Steel Shackle with Screw Pin has been designed tough and made from the highest quality materials. Product is backed by a no-hassle One Year Guarantee against defects. Quantity Included: TEN Anchor Shackles. Size/Dimensions: 1/4" thick shackle with 5/16" diameter pin. Material: Galvanized steel. Strength: WLL 1000 lbs. Durable, ready to handle tough environments.