0
The 8pc 3/8" Drive Interchangeable Torque Wrench Set is designed for precision-controlled fastening where accuracy and versatility are required.
Featuring an interchangeable head system with a 14×18mm square interface, the torque wrench can be used in both ratcheting mode and fixed wrench mode, making it suitable for a wide range of professional applications.
This set is ideal for automotive workshops, industrial maintenance, and service technicians who require reliable torque accuracy and flexible tooling options.
Interchangeable head system with square interface
Plug-in inserts design for ratcheting and fixed wrench use
3/8" drive torque wrench with wide torque range
72-tooth ratchet head for smooth operation and fine engagement
±3% torque accuracy for precision fastening
Suitable for professional and industrial applications
Automotive repair and maintenance
Industrial assembly and servicing
Precision fastening applications
Workshop and field service use
Equipment installation and maintenance
1 × Torque Wrench: 20–120 Nm
1 × 72-Tooth Ratchet Head: 3/8" Drive
6 × Open-Ended Spanner Heads:
17 mm
22 mm
24 mm
26 mm
27 mm
30 mm
| Item | Specification |
|---|---|
| Drive Size | 3/8" |
| Torque Range | 20–120 Nm |
| Head Interface | 14 × 18 mm square |
| Ratchet Mechanism | 72 Tooth |
| Accuracy | ±3% |
| Number of Pieces | 8 pcs |
| Operation Mode | Ratcheting & Fixed wrench |
| Application | Professional / Industrial use |
The standard GM6251 set includes a 3/8″ ratchet head and six fixed open-end heads. For OEM projects, Greatmax can evaluate alternative head configurations according to the required fastener sizes, torque range, interface and application. Adjustable-head compatibility and torque-rating requirements must be confirmed before production.
Does changing the interchangeable head affect the torque setting?
It can. When an interchangeable head is installed in line with the wrench and increases its effective lever length, the torque setting may require correction. If the head is positioned at 90 degrees, correction is generally unnecessary. Learn how to calculate the correct setting in our guide: Does Changing an Interchangeable Torque Wrench Head Affect the Torque Setting?
Can an adjustable wrench head be used with this torque wrench?
Only a purpose-designed head with a compatible 14 × 18 mm interface and suitable torque rating should be used. The head length and operating position may affect the required torque setting. Read our guide: Can%20You%20Use%20an%20Adjustable%20Wrench%20Head%20on%20a%20Torque%20Wrench?
">Can You Use an Adjustable Wrench Head on a Torque Wrench?OEM / ODM production available
Custom torque range marking and branding supported
Suitable for distributor and private label programs
Consistent quality control for bulk supply
Designed for long-term professional use