Features: 1) Standards: grade 80, US type 1/4" to 1-1/4" and European type 6 - 8mm to 32 - 8mm 2) Material: carbon steel, 40Cr, 42CrMo and 35CrMo alloy steel 3) Precise and performance: forged, heat treated; UL is 4 times of WLL Packing: Carton, bag, pallet