Material quality: high quality steelFinished appearance: smooth surface without burrs or sharp cornersInternal length: 34-40mmCrimping width: â¤10mmExecutive standard: EN 12568: 2010 GB/T 28288-2012 ISO 20345: 2004Impact resistance: safety shoes impact resistance 200 joules / protective shoes impact resistance 100 joulesStatic pressure resistance: safety shoes can withstand static pressure 15 kN/protective shoes can withstand static pressure 10 kNCorrosion resistance: â¤3 placesExecutive standard: ASTMF 2412-11Smash resistance rating: I75 (101.75 Joules)Withstand voltage rating: C75 (11121 Newton)Executive standard: CSA Z 195-09Impact resistance: 125 joules at the first level / 90 joules at the second levelAdvantages: price advantage, balanced appearance, stable performance, efficient production