Product Description
This chrome-plated double box end wrench is integrally forged from high-quality alloy steel, offering exceptional durability with a perfect balance of strength and toughness. Fine polishing and double-layer nickel-chrome plating provide excellent rust and corrosion resistance with a bright, polished appearance. Full-body heat treatment delivers performance exceeding US ASME standards by over 30%, ensuring reliable quality. The double box end design with two different sizes per wrench provides dual functionality — even force distribution prevents slipping and handles higher torque. With 29 sizes from 5.5×7mm to 50×55mm, this is one of the most comprehensive box end wrench series available. Widely used in automotive repair, mechanical assembly, plumbing installation, equipment maintenance, construction, marine repair, mining operations and other professional scenarios — essential tools for professional technicians and industrial maintenance.
Product Features
Premium Alloy Steel Forging — Integrally forged from high-quality alloy steel with high strength and toughness, durable and resistant to deformation and cracking
Double Nickel-Chrome Plating — Fine polishing + double-layer nickel-chrome surface finish delivers superior rust and corrosion resistance with a bright, polished appearance
Integral Forged Construction — One-piece integral forging with no welding or joints, higher structural strength and longer service life
Full-Body Heat Treatment — Complete quenching and tempering ensures uniform and stable hardness, exceeding ASME standards by over 30%
Double Box End Design — Two different size box ends per wrench for dual functionality. Even force distribution prevents slipping, safe and reliable for high-torque work
29 Sizes Full Coverage — From 5.5×7mm to 50×55mm, 29 sizes total — one of the most comprehensive box end wrench series available
Precision Machining — Precision-machined opening sizes with strict tolerance control, excellent fit with bolts and nuts, reducing wear
Professional Industrial Grade — Industrial-grade quality standard, suitable for high-strength, high-frequency professional use scenarios with excellent value
Product Specifications
| Model | Size | Overall Length | Box Qty | Carton Qty | Unit Weight | G.W. |
|---|---|---|---|---|---|---|
| W12101 | 5.5×7 mm | 124 mm | 10 pcs | 200 pcs | 0.04 kg | 7.20 kg |
| W12102 | 6×7 mm | 124 mm | 10 pcs | 200 pcs | 0.04 kg | 7.20 kg |
| W12103 | 8×10 mm | 145 mm | 10 pcs | 200 pcs | 0.04 kg | 8.10 kg |
| W12104 | 9×11 mm | 168 mm | 10 pcs | 200 pcs | 0.06 kg | 13.00 kg |
| W12105 | 10×12 mm | 170 mm | 10 pcs | 200 pcs | 0.06 kg | 13.20 kg |
| W12106 | 11×13 mm | 198 mm | 10 pcs | 200 pcs | 0.09 kg | 17.50 kg |
| W12141 | 12×13 mm | 198 mm | 10 pcs | 200 pcs | 0.82 kg | 17.40 kg |
| W12107 | 12×14 mm | 198 mm | 10 pcs | 200 pcs | 0.09 kg | 17.30 kg |
| W12108 | 13×15 mm | 223 mm | 10 pcs | 200 pcs | 0.13 kg | 26.70 kg |
| W12109 | 13×16 mm | 226 mm | 10 pcs | 200 pcs | 0.13 kg | 25.70 kg |
| W12110 | 14×17 mm | 232 mm | 10 pcs | 200 pcs | 0.13 kg | 26.20 kg |
| W12111 | 16×18 mm | 232 mm | 5 pcs | 200 pcs | 0.15 kg | 29.00 kg |
| W12112 | 17×19 mm | 265 mm | 5 pcs | 100 pcs | 0.18 kg | 17.90 kg |
| W12113 | 18×21 mm | 270 mm | 5 pcs | 80 pcs | 0.31 kg | 25.00 kg |
| W12114 | 19×21 mm | 290 mm | 5 pcs | 80 pcs | 0.25 kg | 20.80 kg |
| W12115 | 19×22 mm | 270 mm | 5 pcs | 80 pcs | 0.30 kg | 24.20 kg |
| W12116 | 21×23 mm | 308 mm | 5 pcs | 50 pcs | 0.34 kg | 17.50 kg |
| W12117 | 22×24 mm | 311 mm | 5 pcs | 50 pcs | 0.35 kg | 17.50 kg |
| W12118 | 23×26 mm | 355 mm | 5 pcs | 50 pcs | 0.44 kg | 23.00 kg |
| W12119 | 24×27 mm | 360 mm | 5 pcs | 50 pcs | 0.47 kg | 23.60 kg |
| W12120 | 27×30 mm | 395 mm | 5 pcs | 40 pcs | 0.56 kg | 22.50 kg |
| W12121 | 30×32 mm | 415 mm | 5 pcs | 25 pcs | 0.72 kg | 19.00 kg |
| W12122 | 30×34 mm | 435 mm | 5 pcs | 20 pcs | 0.75 kg | 16.00 kg |
| W12123 | 32×34 mm | 440 mm | 5 pcs | 20 pcs | 0.76 kg | 16.00 kg |
| W12124 | 32×36 mm | 440 mm | 5 pcs | 20 pcs | 0.77 kg | 16.00 kg |
| W12125 | 34×36 mm | 440 mm | 5 pcs | 20 pcs | 0.85 kg | 18.00 kg |
| W12126 | 36×41 mm | 450 mm | 5 pcs | 20 pcs | 1.00 kg | 21.00 kg |
| W12127 | 41×46 mm | 465 mm | 5 pcs | 20 pcs | 1.25 kg | 26.00 kg |
| W12128 | 46×50 mm | 480 mm | 5 pcs | 10 pcs | 1.46 kg | 15.00 kg |
| W12129 | 50×55 mm | 535 mm | 5 pcs | 10 pcs | 1.85 kg | 19.50 kg |
Material: High Quality Alloy Steel
Surface Finish: Fine Polished + Double Nickel-Chrome Plated
Standard: Exceeds ASME Standard by 30%+
Type: Double Box End Wrench
Surface Finish: Fine Polished + Double Nickel-Chrome Plated
Standard: Exceeds ASME Standard by 30%+
Type: Double Box End Wrench
Applications
Automotive Repair & Maintenance — Engine, transmission, chassis and suspension system bolt/nut removal; large sizes fit heavy trucks and construction machinery
Mechanical Assembly & Manufacturing — Machinery equipment assembly and precision installation/tightening of various standard hex fasteners
Plumbing Installation & Repair — Plumbing fixtures, industrial pipelines, valve flange bolt tightening; box end design prevents bolt rounding
Equipment Maintenance — Production line equipment, motors, pumps, compressors, gearboxes 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; chrome-plated rust-resistant surface suitable for marine humid environments
Mining Equipment Maintenance — Mining machinery equipment inspection and maintenance; high-strength material handles harsh working conditions and large-size bolts
Heavy Machinery Repair — Engineering machinery, agricultural machinery, heavy equipment maintenance, covering oversized specs up to 50mm
Electrical Power Construction — Power transmission/distribution equipment, transformers, switchgear installation and maintenance, meeting power industry requirements
Petrochemical Industry — Refining equipment, pipeline valves, flange bolt installation and maintenance; industrial-grade quality assurance
Why Choose Us
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.
29 Sizes, Ample Stock — Full series of 29 sizes in stock, from 5.5mm to 55mm full coverage — one of the most comprehensive series available. Ready to ship upon order placement.
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 — 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.
FAQ
Q1: What material is this box end wrench made of? How is the hardness?
A: Integrally 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.
A: Integrally 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: How many sizes are available? What are the minimum and maximum sizes?
A: The full series includes 29 sizes, from 5.5×7mm to 50×55mm — one of the most comprehensive box end wrench series on the market, covering almost all common and large bolt sizes.
A: The full series includes 29 sizes, from 5.5×7mm to 50×55mm — one of the most comprehensive box end wrench series on the market, covering almost all common and large bolt sizes.
Q3: What’s the difference between box end and open end wrenches? How to choose?
A: Box end wrenches have a closed ring design with 12-point contact, distributing force evenly, preventing slipping and bolt damage, and handling higher torque — ideal for high-torque and precision work. Open end wrenches allow faster assembly/disassembly for quick operations. Using both together provides the best results.
A: Box end wrenches have a closed ring design with 12-point contact, distributing force evenly, preventing slipping and bolt damage, and handling higher torque — ideal for high-torque and precision work. Open end wrenches allow faster assembly/disassembly for quick operations. Using both together provides the best results.
Q4: What surface treatment is used? Will it rust?
A: Fine polishing + double-layer nickel-chrome plating provides strong rust and corrosion resistance. Under normal use and maintenance, it resists rusting well and maintains a bright chrome appearance.
A: Fine polishing + double-layer nickel-chrome plating provides strong rust and corrosion resistance. Under normal use and maintenance, it resists rusting well and maintains a bright chrome appearance.
Q5: What’s the difference between integral forging and welded wrenches?
A: Integral forging is one-piece construction with no weld points, higher structural strength, even force distribution and longer service life. Welded wrenches tend to break at the weld point, especially under high torque, posing safety risks. All our products use the integral forging process.
A: Integral forging is one-piece construction with no weld points, higher structural strength, even force distribution and longer service life. Welded wrenches tend to break at the weld point, especially under high torque, posing safety risks. All our products use the integral forging process.
Q6: 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.
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.
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.
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.
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.
