Mo-Clamp › #6317 “J” Hook Image 1 of 1 #6317 “J” Hook $77.78 Specifications: Overall length: 9” (228 mm), Weight: 2 lbs. (.91 kg), Capacity: 4 tons (3,629 kg). Add To Cart Added! Specifications: Overall length: 9” (228 mm), Weight: 2 lbs. (.91 kg), Capacity: 4 tons (3,629 kg).