1. Material: alloy 2. Applicable to: construction industry, manufacturing industry, household maintenance, auto repair industry 3. Large-depth spiral twisted texture, high hardness, easy to use 4. Variety of specifications, wide range of applications, can cope with a variety of working environments 5. Anti-rust and corrosion-resistant, long service life, not easy to damage 6. Size: 17/19/21/22mm 7. Sleeve length: 50mm 8. Square mouth specification: 1/2 inch (12.5mm) 9. Box size: 160x120x45mm 10. Weight: 0.81 kg