Multi-Function Self-Tightening Wrench: A versatile tool designed for a wide range of applications, perfect for professional and home use Durable Material: Constructed from durable chrome vanadium steel, this wrench ensures high strength and long-lasting performance under heavy-duty usage Suitable for 3-17mm Screws: This universal wrench is designed to accommodate a wide range of screw diameters, from 3mm to 17mm, making it ideal for various tasks Electroplating Surface Treatment: The electroplated surface ensures rust resistance and durability, keeping the wrench in excellent condition over time Wide Application: Widely used in automotive repair, mechanical assembly, disassembly, and daily maintenance, this wrench is a must-have tool for multiple applications Specifications: Material: Chrome vanadium steel Length: 150mm Applicable: 3-17mm diameter screws Surface treatment: electroplating Process: cold cutting process Scope of application: widely used in auto repair industry, mechanical disassembly, assembly, daily maintenance and other purposes