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Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type
Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type
Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type
Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type
Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type
Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type

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Double Box End & Open End Wrenches, CR-V Steel Straight/S-Shaped/U-Type

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The YONK Wrench Set combines straight, S-shaped offset box end wrenches and U-type open end wrenches, all made of premium CR-V steel. The box ends deliver high torque without rounding bolts, while the open/U-type ends allow quick, convenient fastening. Ideal for automotive, mechanical and industrial repair tasks.
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Product Overview

The YONK Wrench Set is engineered for professional mechanics, technicians and DIY enthusiasts who need versatile, reliable tools for all fastening tasks.

Key Features


Premium CR-V Steel Construction

Each wrench is forged from high-grade CR-V (Chrome Vanadium) steel, then heat-treated for exceptional hardness, toughness and wear resistance. The mirror-polished surface resists rust and corrosion, ensuring long-lasting durability even in harsh working environments. Precision machining guarantees a perfect fit with metric fasteners, preventing rounding and cam-out.



Three Classic Designs for All Scenarios

  • Straight Box End Wrench: Standard straight handle for maximum leverage, ideal for general-purpose heavy-duty fastening and loosening.

  • S-Shaped Offset Box End Wrench: The curved S-shape lifts the handle above the fastener, allowing access to bolts in recessed, tight or confined spaces where standard straight wrenches cannot fit.

  • U-Type / Open End Wrench: The open U-shaped jaw allows for quick and easy engagement with fasteners, even when the bolt head is partially obstructed. Perfect for fast assembly and disassembly.



High-Torque Box End & Quick-Release Open End

  • Box End: 12-point design provides multiple engagement angles and even torque distribution, preventing bolt head damage.

  • Open/U-Type End: Wide jaw opening for quick application, perfect for situations where speed is more important than maximum torque.



Complete Set with Metric Sizes

This set includes a full range of common metric sizes (typically 6mm - 22mm) to cover all your fastening needs. Perfect for automotive repair, mechanical maintenance, industrial equipment assembly and general home DIY projects.

Parameter

Specification

Material

CR-V Steel

Head / Bit

Double Box End

Craftsmanship

Heat-Treated & Polished

Handle

straight & S-shaped & U-type Handle

Function

High Torque & Quick Release

Application Scenarios

  • Automotive & Motorcycle Maintenance & Repair

  • Industrial Equipment & Mechanical Mold Assembly

  • Household Appliances & Precision Equipment Maintenance

  • Construction Renovation & Pipe Installation & Repair

  • Hardware DIY & Model Making

  • Daily Home & Office Equipment Maintenance

Kingfaith is a professional manufacturer specializing in industrial construction tools and pipe processing equipment. Our product range includes cordless pipe threading machines, rebar threading tools, and other portable equipment designed for construction and pipeline installation projects.

Our products are widely used by construction contractors, engineering companies, and pipeline installation teams for municipal projects, building construction, and industrial pipeline systems.

With a focus on product reliability, practical design, and stable manufacturing quality, we are committed to providing efficient tools that improve productivity on construction sites.
Our Work Statistics
Our tools are widely used in construction projects, pipeline installation, and industrial maintenance worldwide.
  • 10+
    Years Industry Experience
  • 5000+
    Customers Served
  • 50+
    Export Markets
  • 1000+
    Construction Projects Supported
Why Choose Us?

1. Professional Grade & Premium Quality
Made of high-quality CR-V steel, our wrenches deliver exceptional hardness, toughness and wear resistance. They outperform ordinary carbon steel tools, perfect for professional repair work and heavy-duty use.
2. Three-in-One Versatile Design
Combines straight box end, S-shaped offset box end, and U-type open end wrenches in one set. Meets all your fastening needs for both high-torque and quick-release tasks.
3. Anti-Slip & Anti-Rounding Design
The 12-point box end ensures a secure, even grip on the fastener, preventing rounding and slippage. The open end allows for fast and convenient operation.
4. Complete Set with Wide Application
Includes a full range of common metric sizes. Ideal for automotive, mechanical, industrial and home DIY projects.
FAQs
  • What material are these wrenches made of?
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    They are made of premium CR-V (Chrome Vanadium) steel, which is heat-treated for high hardness, toughness and wear resistance.
  • What is the advantage of the S-shaped offset design?
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    The S-shaped offset lifts the handle above the fastener, allowing access to bolts in recessed, tight or confined spaces where standard straight wrenches cannot fit.
  • Do the box ends prevent rounding of bolt heads?
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    Yes, the 12-point box end grips the fastener securely on all sides, distributing torque evenly to prevent rounding and damage to the bolt head.
  • Can I use these for automotive repair?
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    Absolutely. The combination of straight and offset designs makes them ideal for accessing hard-to-reach bolts in engines, transmissions and undercarriages.
  • How do I maintain the wrenches?
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    Keep them clean and dry after use. Apply a light coat of oil to the surface periodically to prevent rust. Store them in a dry place.
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