Robbor Grab Hook 3 8" Weld on Chain Hook Heavy Duty Tow Hook G70 Forged Grade 100 Clevis Type Grab Hook HESWA Hyperlift Stronger Safer Titan 5 16 Bolt On Grab Hook Hardware&Tools Online Store Grab Hook 5 16. Robbor 5 16 Bolt on Grab Hook with Backer Plate and Complete Hardware for Installation. Robbor Bolt on Grab Hook is Grade 70 rated at 4700 lb. WLL (Working Load Limit). Robbor Bolt on Grab Hook is Welded On a 1 4" Thick Steel Plate. Entire Bolt on Grab Hook Kit is Zinc Chromate Plated for Weather Protection. Every Mount Includes 1 2" x 1 1 2" Grade 8 Bolts with Washers and Nylon Lock Nut.