Mo-Clamp › #6318 “J” Hook w/ Grab Hook Image 1 of 1 #6318 “J” Hook w/ Grab Hook $78.35 sold out Specifications: Overall length: 9” (228 mm), Weight: 2 lbs. (.91 kg), Capacity: 4 tons (3,629 kg). Sold Out Added! Specifications: Overall length: 9” (228 mm), Weight: 2 lbs. (.91 kg), Capacity: 4 tons (3,629 kg).