Extra Long Mirror-Polished Double Box End Wrench Set

This extra long mirror-polished double box end wrench set 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 box end design with two different sizes per wrench improves work efficiency. The set comes with a high-quality canvas roll pouch for organized storage and convenient portability. Available in 8-piece and 10-piece configurations covering the most commonly used bolt sizes — the ideal tool set for automotive repair, mechanical assembly, equipment maintenance, plumbing installation and other professional scenarios, as well as a high-value option for promotional gifts and tool procurement.

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

Double Nickel-Chrome Plating — Fine polishing + lapping + double nickel-chrome plating for superior rust and corrosion resistance with a mirror-polished appearance

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 and efficient

Double Box End — Two different size box ends per wrench for dual functionality. Even force distribution prevents slipping, safe and reliable for high-torque work

Canvas Roll Pouch Storage — High-quality canvas roll pouch included, each set independently stored for convenient portability and tool protection

Multiple Set Options — Available in 8-piece and 10-piece sets covering the most commonly used bolt sizes to meet different working requirements

Material: High Quality Alloy Steel

Surface Finish:  Fine Polished + Double Nickel-Chrome Plated (Mirror Polish)

 Standard:  Exceeds ASME Standard by 30%+

Packaging:  Canvas Roll Pouch

 Type: Extra Long Double Box End Wrench Set

Automotive Repair & Maintenance — Essential tool set for 4S shops, auto repair shops, quick lube shops; suitable for engine, chassis and transmission repair

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

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

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

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

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

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

Home DIY Tools — Must-have set for home toolboxes; furniture assembly, appliance repair, bicycle maintenance — all covered

Gift & Promotion Set — Beautiful appearance, practical and durable; ideal choice for corporate gifts, promotional activities and employee benefits

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

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

Ample Stock, Fast Delivery — Both 8-piece and 10-piece sets in stock. 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 over 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 — Standard canvas roll pouch packaging available. Support custom brand LOGO, exclusive packaging design and different size combination sets to meet different customer needs.

Set Advantage, Promotion Favorite — Beautifully packaged set with high practical value — a cost-effective choice for gifts, promotions, employee benefits and corporate procurement.

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 box end wrench set 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 8-piece and 10-piece sets? How to choose?
A: The 8-piece set includes 8 sizes from 5.5×7mm to 24×27mm, suitable for daily basic repair use. The 10-piece set adds 9×11mm and 30×32mm for wider coverage, ideal for professional repair and large bolt work. Choose based on actual usage needs.

Q3: What kind of packaging does the set come with?
A: Each set includes a high-quality canvas roll pouch with individual slots for each size — organized storage, convenient portability, effective tool protection against bumps and damage, and easy to carry for on-site work.

Q4: What’s the difference between extra long and regular box 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 scenarios.

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

Q6: Do you support custom LOGO and packaging? What’s the MOQ?
A: Yes, OEM/ODM customization is supported, including laser marking on wrenches, canvas bag printing, custom packaging design, and custom size combination sets. MOQ depends on specific customization requirements, please contact us for details.

Q7: 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.

Q8: Is there a quality guarantee?
A: We provide comprehensive quality assurance. All products undergo strict quality inspection before shipment. If quality issues are found upon receipt (non-human damage), please contact us for return/exchange processing.