Extra Long Mirror Polished Double Open End Wrench, Alloy Steel Forged, Double Nickel

This extra long mirror-polished double open end wrench is precision forged from high-quality alloy steel, featuring fine polishing and lapping processes with double-layer nickel-chrome plating for excellent rust and corrosion resistance. The unique offset design follows ergonomic usage habits for comfortable and effortless operation. Full-body heat treatment delivers performance exceeding US ASME standards by over 30%, combining strength and toughness. The extended handle provides greater leverage and torque output, while the double open end design with two different sizes per wrench improves work efficiency. The full series of 17 sizes, from 6×7mm to 30×32mm, is suitable for automotive repair, mechanical assembly, plumbing installation, equipment maintenance, construction and other professional scenarios — essential tools for professional technicians and industrial maintenance.

Premium Alloy Steel Forging — Precision forged from high-quality alloy steel with high strength and toughness, durable and resistant to deformation

Double Nickel-Chrome Plating — Double-layer nickel-chrome surface finish provides superior rust and corrosion resistance with a beautiful mirror-polished appearance

Fine Polishing & Lapping — Multiple processes of fine polishing and lapping create a smooth, refined surface with comfortable hand feel

Ergonomic Offset Design — Offset angle design avoids obstacles during operation, ideal for working in confined spaces

Full-Body Heat Treatment — Complete quenching and tempering ensures uniform and stable hardness, exceeding ASME standards by over 30%

Extra Long Design — Extended handle provides greater leverage for higher torque output, making large bolt assembly/disassembly more effortless

Double Open End — Two different size open ends per wrench, one tool serves dual purposes, reducing tool count and cost

17 Sizes Full Coverage — From 6×7mm to 30×32mm, 17 sizes available to meet various working scenario requirements

Material: High Quality Alloy Steel
Surface Finish: Double Nickel-Chrome Plated (Mirror Polish)

Standard: Exceeds ASME Standard by 30%

Automotive Repair & Maintenance — Engine, transmission and chassis bolt removal; extra long design reaches deep into tight spaces

Mechanical Assembly & Manufacturing — Machinery equipment assembly and precision installation/tightening of various standard hex bolts and nuts

Plumbing Installation & Repair — Plumbing fixtures, industrial pipelines, valve flange bolt tightening; offset design adapts to confined spaces

Equipment Maintenance — Production line equipment, motors, pumps, compressors and other daily inspection and maintenance in factories

Construction Engineering — Steel structure installation, scaffolding setup, formwork support fastening and other construction scenarios

Marine Repair & Maintenance — Engine room machinery maintenance; rust-resistant surface suitable for marine humid environments

Electrical Power Construction — Power transmission/distribution equipment, transformers, switchgear installation and maintenance, meeting power industry requirements

Mining Equipment Maintenance — Mining machinery equipment inspection and maintenance; high-strength material handles harsh working conditions

Home DIY Repair — Furniture assembly, appliance repair, bicycle maintenance, plumbing repair and other household daily use

Direct Factory, Quality Controlled — Own production base with strict full-process control from raw material forging to finished packaging. Each wrench undergoes multiple quality inspection procedures to ensure consistent factory quality.

Factory Direct, Competitive Pricing — Factory direct supply eliminates middlemen for more competitive wholesale prices. Support for large-volume OEM/ODM custom orders with bulk discounts.

17 Sizes, Ample Stock — Full series of 17 sizes in stock, from 6mm to 32mm full coverage. Ready to ship upon order placement, meeting urgent restocking and bulk purchasing needs.

Exceeds US Standards, After-Sales Guarantee — Full-body heat treatment exceeds ASME standards by 30%. Stable and reliable product quality with comprehensive after-sales guarantee for non-human damage.

Professional Foreign Trade Team — Years of experience in tool export, supporting FOB/CIF/DDP and other trade terms, familiar with international logistics and customs clearance processes, with professional end-to-end support.

Flexible Packaging, Customization Supported — Various box and carton packaging specifications available. Support custom brand LOGO, exclusive packaging design and product combination sets to meet different customer needs.

R&D Capability — Professional R&D team continuously optimizes product processes and design. Can develop custom sizes and special feature products based on customer requirements.

Trusted by Global Customers — Products exported to Southeast Asia, Middle East, Europe, America, Africa and other countries and regions, widely recognized by overseas wholesalers, distributors and industrial clients.

Q1: What material is this double open end wrench made of? How is the hardness?
A: Precision forged from high-quality alloy steel with full-body heat treatment (quenching + tempering). Uniform and stable hardness delivers performance exceeding ASME standards by over 30%, with high strength, good toughness and long durability.

Q2: What’s the difference between open end and box end wrenches? How to choose?
A: Open end wrenches have an open design for fast assembly/disassembly, suitable for quick operations and larger spaces. Box end wrenches have a closed ring design with even force distribution and less slippage, suitable for high torque and precision work. Using both together provides the best results.

Q3: How many sizes are available? What are the minimum and maximum sizes?
A: The full series includes 17 sizes, from 6×7mm to 30×32mm, covering almost all commonly used hex bolt sizes in daily repair and industrial applications.

Q4: What’s the difference between extra long and regular open end wrenches?
A: The extra long handle provides greater leverage and torque output, especially suitable for large bolt assembly/disassembly and deep-reach fasteners, with significant labor-saving effect, also ideal for professional heavy-duty use.

Q5: What surface treatment is used? Will it rust?
A: Double-layer nickel-chrome plating with fine polishing and lapping provides strong rust and corrosion resistance. Under normal use and maintenance, it resists rusting well and maintains a mirror-like appearance.

Q6: What’s the purpose of the offset design?
A: The unique offset angle allows the wrench to avoid obstacles during operation, making it more suitable for use in narrow spaces. It also fits the natural hand-gripping habit for more comfortable and efficient operation.

Q7: Do you support custom LOGO and packaging? What’s the MOQ?
A: Yes, OEM/ODM customization is supported, including laser marking LOGO, custom packaging design, and product combination sets. MOQ depends on specific customization requirements, please contact us for details.

Q8: What about delivery time and shipping methods?
A: Regular sizes are in stock and ship within 3-7 working days after payment. Multiple shipping methods available: sea freight, air freight, express delivery. FOB/CIF/DDP trade terms can be arranged per customer request.