Introduction
This manual provides detailed instructions for the safe and effective use, maintenance, and care of your DURATECH 5-piece Metric Double Offset Box End Reversible Ratcheting Wrench Set. Please read this manual thoroughly before using the tools and retain it for future reference.
Product Overview
The DURATECH Metric Double Offset Box End Reversible Ratcheting Wrench Set is designed for efficient fastening and loosening of nuts and bolts, particularly in confined spaces. The set includes five wrenches with double-ended metric sizes.
Package Contents:
- 1 x Storage Pouch
- 1 x 6mm x 8mm Double Offset Reversible Ratcheting Wrench
- 1 x 10mm x 12mm Double Offset Reversible Ratcheting Wrench
- 1 x 13mm x 14mm Double Offset Reversible Ratcheting Wrench
- 1 x 15mm x 17mm Double Offset Reversible Ratcheting Wrench
- 1 x 19mm x 21mm Double Offset Reversible Ratcheting Wrench

Image: The complete set of five double offset ratcheting wrenches, neatly arranged with their accompanying storage pouch.

Image: A visual representation of each wrench, displaying its length in millimeters and the corresponding metric sizes (6mm, 8mm, 10mm, 12mm, 13mm, 14mm, 15mm, 17mm, 19mm, 21mm) along with the tooth count for each ratchet gear.
Key Features
25° Offset Design
Both box ends of the ratcheting wrenches feature a 25° offset. This design provides increased clearance, allowing for easier access and operation in tight or obstructed working areas where a straight wrench might not fit.

Image: A close-up demonstrating the 25° tilt angle of the wrench head, highlighting its utility for reaching fasteners in restricted spaces.
Reversible Ratcheting Mechanism
Each wrench is equipped with a 12-point box end ratcheting mechanism. This allows for quick engagement with fasteners and prevents rounding off. The ratcheting action enables continuous turning without removing the wrench from the fastener, significantly improving work efficiency.

Image: A detailed view of the ratcheting head, illustrating the 72-tooth mechanism and the simple lever for changing the direction of rotation (forward and reverse).
Direction Reversing Lever
A reversing lever is present on each end of the box end ratcheting wrench. This allows users to quickly change the direction of rotation (tightening or loosening) without needing to remove the wrench from the fastener, streamlining the work process.
Durable Construction
These wrenches are manufactured from high-quality carbon steel with a matte chrome-plated finish for enhanced rust resistance and durability. The body is secured by four rivets, ensuring a strong and stable construction that resists falling apart during use. The full metal design contributes to greater strength and torque application.

Image: An exploded view highlighting key construction elements: surface sandblasting and chrome-plating, large size stamp, 12-point box end, reversing switch, rivet fixation, and the full metal body for enhanced durability.
Setup
- Unpack: Carefully remove the wrench set from its packaging.
- Inspect: Examine each wrench for any signs of damage or manufacturing defects. Do not use damaged tools.
- Familiarize: Identify the different sizes and the reversing lever on each wrench.
Operating Instructions
- Select Correct Size: Choose the wrench with the appropriate metric size that matches your fastener. The sizes are clearly stamped on both ends of the wrench beam.
- Engage Fastener: Place the box end of the wrench over the nut or bolt head. Ensure it is fully seated to prevent slipping and damage to the fastener or wrench.
- Set Direction: Use the reversing lever on the wrench head to select the desired direction of rotation (tighten or loosen).
- Apply Torque: Apply steady, firm pressure to the wrench handle to turn the fastener. The ratcheting mechanism allows for quick, repetitive turns without repositioning the wrench.
- Utilize Offset Design: For fasteners in narrow or hard-to-reach areas, leverage the 25° offset design to gain better access and apply torque effectively.

Image: A person demonstrating the use of the offset ratcheting wrench to access a fastener in a confined space under a vehicle, highlighting its practical application.
Maintenance
- Cleaning: After each use, wipe the wrenches clean with a dry cloth to remove dirt, grease, and debris. For stubborn grime, use a mild degreaser and then wipe dry.
- Lubrication: Periodically apply a light coat of machine oil to the ratcheting mechanism to ensure smooth operation and prevent corrosion.
- Storage: Store the wrenches in the provided storage pouch in a dry environment to prevent rust and damage. Keep them away from excessive moisture and corrosive substances.
- Inspection: Regularly inspect the wrenches for any signs of wear, damage, or deformation. Discontinue use if any damage is found.
Troubleshooting
- Wrench Slipping: Ensure the correct size wrench is used and fully seated on the fastener. Avoid using worn or damaged fasteners.
- Ratcheting Mechanism Sticking: Clean the ratcheting head thoroughly and apply a small amount of lubricant. Ensure no debris is obstructing the mechanism.
- Difficulty Changing Direction: Check if the reversing lever is fully engaged. Clean any debris around the lever mechanism.
- Fastener Stuck: Do not force the wrench. Apply penetrating oil to the fastener if it is seized. Use appropriate leverage without exceeding the tool's intended capacity.
Specifications
| Specification | Detail |
|---|---|
| Brand | DURATECH |
| Model Number | DTRRW05M |
| Material | Carbon Steel, Chrome Plated |
| Finish Type | Chrome Plated, Matte |
| Head Style | Box End |
| Is Ratcheting | Yes |
| Measurement System | Metric |
| Sizes Included | 6x8 mm, 10x12 mm, 13x14 mm, 15x17 mm, 19x21 mm |
| Item Weight | 2.99 pounds |
| Package Dimensions | 10.94 x 3.66 x 2.68 inches |
Safety Information
- Always wear appropriate personal protective equipment, such as safety glasses, when using hand tools.
- Ensure the wrench is properly seated on the fastener to prevent slipping and potential injury.
- Do not use wrenches that are damaged, cracked, or worn.
- Do not use a pipe or other extension on the wrench handle to increase leverage, as this can overload the tool and cause breakage or injury.
- Keep hands and fingers clear of moving parts, especially the ratcheting mechanism.
- Store tools safely out of reach of children.
Warranty and Support
DURATECH products are manufactured to high-quality standards. For information regarding warranty coverage, product support, or to report any issues, please refer to the contact information provided with your purchase or visit the official DURATECH website. Please retain your proof of purchase for warranty claims.





