1. Material: steel 2. Weight: number 1 is about 95 grams, number 2 is about 173 grams, number 3 is about 437 grams, number 4 is about 658 grams 3. Full length: number 1 is about 8 cm, number 2 is about 10.2 cm, number 3 is about 13 cm, and number 4 is about 15 cm. 4. Scope of application: number 1 is about 9-12 mm, number 2 is about 12-16 mm, number 3 is about 16-22 mm, number 4 is about 22-27 mm 5. Bolt diameter: number 1 is about 12 mm, number 2 is about 14 mm, number 3 is about 18 mm, number 4 is about 21 mm 6. Features: It is made of steel forging and pressing, after heat treatment, it has high hardness, impact resistance, wear resistance and durability. It can be used with a socket wrench, easy to operate, simple and easy to use
