Great Wall Dual-Use Wrench Open-End and Box-End Wrench Industrial Auto Repair Tool 40mm 317140

National-level Specialized and New (“”) Key “Little Giant” Enterprise

First batch of Specialized and New “Little Giant” Enterprises

Well-known Trademark

Certified by Ningbo Great Wall Seiko Industrial Co., Ltd.

Ministry of Industry and Information Technology recognition

Zhejiang Famous Brand

Intellectual Property National Certification

Safety Production Standardization Certificate

Level 1 Clean Production Enterprise in Metal Industry

Forged from premium chrome vanadium steel

High hardness up to 46 HRC (1.5 times above national standard)

Overall heat treatment for enhanced durability and toughness

Polished mirror surface finish for rust resistance and clean appearance

Thickened and extended wrench body for increased leverage and torque

Smooth and flat blade edges, wear-resistant opening

Precision-crafted hexagonal () socket with reinforced thickness to prevent slipping and cracking

Torque tested with professional instruments, maximum torque up to 777 Nm