1. Material: carbon steel
2. Specification: M4-M30
3. Purpose: connecting the national standard machine taps
4. Applicable equipment: electric, pneumatic or manual wrenches
5. Preferred carbon steel manufacturing, impact resistance, strong torque
6. With anti-release hole, strong biting force to prevent falling off
7. High-precision four-square opening, standard opening, tightening non-slip, can ensure a safe grip
8. Wide range of applications, suitable for professionals and DIY enthusiasts, ideal tool for automotive repair, mold making and home projects
9. Size: about 4cm high