Ultra-Long Shank: With a length 2-3 times longer than standard models (25-50mm), typical specifications include 100mm, 125mm, and 150mm. This design enables access to deep holes in hard-to-reach areas such as pipes and equipment cavities, ideal for tasks like securing screws in automotive engine compartments or installing hidden fasteners in furniture back panels.

Balanced Structure: The "thickened shank + slim head" design shifts the center of gravity rearward to eliminate wobbling during operation. This ensures stable force application even when gripping with one hand, solving the "top-heavy" issue common in ordinary extended bits.

Optimized Torque Transmission: The one-piece forging process of the extended shank eliminates torque loss from traditional spliced structures, ensuring full transmission of the 15N·m maximum torque. This maintains high efficiency when working with hard materials like stainless steel.

Anti-Bending Design: The shank is made of high-carbon S2 alloy steel with a hardness of HRC60±2, passing 100,000 bending tests without deformation. This extends the bit’s lifespan by 50% compared to ordinary steel extended bits.

Summary: Through the dual design of "length extension + performance enhancement," the extended series breaks through spatial limitations, becoming a must-have tool for professional technicians in complex scenarios such as deep holes and narrow slots. Its "stable, durable, and easy-to-use" features significantly improve work efficiency in special environments, serving as a vital complement to standard tool kits.