Double-Ended Socket Features
Double-ended sockets are equipped with hexagonal or 12-point socket interfaces of different sizes at both ends (e.g., 10mm on one end and 12mm on the other), allowing quick adaptation to two specifications of bolts/nuts without tool replacement, saving approximately 50% of tool-changing time. Their compact design integrates two commonly used sizes into one tool, making them ideal for space-constrained scenarios (such as automotive engine compartments or pipe gaps), eliminating the need for frequent trips to the toolbox and improving repair and assembly efficiency.

The internal precision tooth pattern design ensures a contact fit of over 95% with the bolt head, evenly distributing applied force to prevent slipping or wear on bolt edges. This maintains stable torque transmission even under high-intensity operations.

Constructed from chrome-vanadium steel (CR-V) or chrome-molybdenum steel (CR-MO), the sockets are forged and heat-treated (quenching + tempering) to achieve a hardness of HRC52-56. Their nickel-plated or black-oxidized surfaces form anti-rust layers, enabling long-term use in oily, acidic, or alkaline environments.

Typically 10-15 cm in length, they offer comfortable single-handed grip and are compatible with ratchet wrenches, extension rods, and other accessories, allowing access to deep holes or unconventional angles. With standard sizes ranging from 4-32mm, they are suitable for automotive repair, appliance disassembly, furniture assembly, and more. Portable sets often come with storage cases for easy carrying by technicians, making them essential tools for electricians, mechanics, and DIY enthusiasts.