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Help CenterBlack Oxide Extension Bar 45# Steel 200mm Length 1-Inch Drive,Heavy Duty Wrench Extension Tool
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Cangzhou Dean Safety & Special Tools Co., Ltd., established in 2001, is proud to present our Black Oxide Extension Bar – a premium heavy duty wrench extension tool crafted from 45# steel with a precise 200mm length and a 1-inch drive. Designed for professional mechanics, industrial maintenance teams, and heavy equipment operators, this extension bar delivers reliable torque transfer and long-lasting performance in the most demanding environments. Our factory-direct supply ensures strict quality control and competitive pricing for global buyers.
Key Features & Benefits:
- Premium Material: Made from 45# medium carbon steel, known for its excellent hardness, strength, and wear resistance. This ensures the extension bar withstands high torque applications without bending or breaking.
- Black Oxide Finish: Provides corrosion resistance, reduces friction during use, and offers a non-glare surface for better visibility in bright work areas. The finish also protects the steel from rust and extends the tool’s service life.
- 1-Inch Drive (25.4mm): Compatible with standard 1-inch drive sockets, ratchets, and torque wrenches – ideal for heavy-duty truck, construction, mining, and agricultural equipment maintenance.
- 200mm (8-inch) Length: Offers an excellent balance between reach and control. Suitable for accessing recessed fasteners while maintaining stability during use.
- Precision Machined: Manufactured with tight tolerances to ensure a secure fit with sockets and drive tools, minimizing play and maximizing torque transfer efficiency.
- Heat Treatment: The steel undergoes controlled heat treatment to achieve optimal hardness (typically HRC 38-42) for enhanced durability without brittleness.
- Heavy Duty Construction: Designed for repeated high-torque applications in professional workshops and industrial sites. Passes rigorous internal drop and fatigue tests.
- Versatile Applications: Suitable for use with impact wrenches, breaker bars, and manual ratchets. Perfect for tightening/loosening lug nuts, flange bolts, and large fasteners.
Technical Specifications
| Specification | Value |
| Material | 45# Steel |
| Length | 200mm / 8 inches |
| Drive Size | 1 Inch (25.4mm) |
| Finish | Black Oxide |
| Hardness (Core) | HRC 38-42 |
| Surface Finish | Smooth, non-glare |
| Weight (approx.) | 0.85 kg / 1.87 lbs |
| Compatible Tools | 1" drive sockets, ratchets, impact wrenches |
Why Choose This Extension Bar?
Compared to standard chrome-plated bars, our black oxide finish reduces surface friction and enhances grip. The 45# steel construction offers superior tensile strength, making it ideal for high-torque impact applications. The 200mm length is specifically chosen for heavy machinery maintenance where clearance is limited but extended reach is necessary. Each bar is individually inspected for dimensional accuracy and surface integrity before packaging.
As a manufacturer with over 20 years of export experience (since 2001), Cangzhou Dean Safety & Special Tools Co., Ltd. exports to North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and many other regions. Our annual export value exceeds US$100 million. We ship from Tianjin, Shanghai, and Ningbo ports, ensuring fast delivery worldwide. All our extension bars are produced under strict quality management systems, and we offer customization options such as different lengths, drive sizes, and logo imprinting. Contact us today for bulk pricing or a sample request – experience the quality that thousands of professionals trust.
Frequently Asked Questions
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Q: What is the maximum torque this extension bar can handle?
A: While exact torque ratings depend on the application and mating tools, the 45# steel and black oxide construction allow it to withstand the typical output of a 1-inch drive impact wrench used in heavy truck maintenance. For specific torque limits, please consult our technical team, as it may vary with usage conditions. -
Q: Can this extension bar be used with impact tools?
A: Yes, this extension bar is designed for heavy-duty use and is suitable for impact wrenches. The black oxide finish and heat-treated steel provide added durability under vibration and shock loads. -
Q: Is the black oxide finish durable?
A: Absolutely. The black oxide coating is chemically bonded to the steel surface, offering excellent corrosion resistance and abrasion protection. With regular care, it maintains its appearance and performance for years. -
Q: Do you offer other lengths or drive sizes?
A: Yes, we provide a range of extension bars from 75mm to 600mm lengths, and drive sizes including 1/2", 3/4", 1", and 1-1/2". Customization is available upon request. Please contact our sales team for your specific requirements. -
Q: What is the minimum order quantity (MOQ)?
A: Our MOQ for standard extension bars is 50 pieces per size. For customized products, the MOQ may vary. We welcome both small trial orders and large container shipments. -
Q: How is the product packaged?
A: Each extension bar is either individually wrapped in plastic sleeves or packed in bulk cartons, depending on the order quantity. Custom packaging with your brand logo is also available. -
Q: Can you provide samples before bulk order?
A: Yes, we offer samples. The sample cost is negotiable, and we can deduct it from your first formal order. Please allow 5-7 business days for sample preparation and shipping. -
Q: What certifications do you have?
A: As a reputable manufacturer, we follow international quality standards. We have internal testing procedures and our products have been exported to many countries. Specific certifications can be provided upon customer request, subject to applicable regulations. Please inquire with our sales team for more details.
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