1,100% high tenacity polyester; 2, Elongation<7%; 3, Sewing by electronic pattern sewing machines; 4, good ratchet and hooks; Ratchet Tie Down with claw hooksRatchet tie ... :-40°c--100°c;5, Safety factor: 2:1 or 3:16, Elongation<7% Warning:1, Only use undamaged Ratchet Tie Down, The label ... cutting by using edge protectors and sleeves for sharp edges. 1.5"&4000kg with claw hooks lashing ratchet