The steel toe caps of safety shoes are divided into An1, An2, An3, An4, An5. The head pressure resistance is 15KN, 10KN, 4.4KN, 3.0KN, 1.5KN, and the internal clearance of the toe is ≥15mm. The safety shoes of the grades An1, An2 and An3 are freely dropped from 900mm, 450mm and 225mm respectively with a 23Kg impact hammer, and the internal clearance of the toe is ≥15mm. The safety shoes of grades An4 and An5 are free to fall with a height of 450mm and 225mm respectively with a 5Kg impact hammer, and the internal clearance of the toe is ≥15mm.
An1 is suitable for operations in metallurgy, mining, forestry, port, ship, loading and unloading, quarrying, heavy work, etc. An2 is suitable for use in machinery, construction, petrochemical and other workplaces; An3 is suitable for use in electronics, food, medicine and other industries; An4 ~An5 is suitable for the textile industry and the clamp industry. It is a labor protection shoe (labor shoes) for toe-free injury. It is a must for labor protection.