Professional Snap-on 7-8mm 12-point metric ratcheting box wrench with chrome finish, dual sizes, and military-spec compliance for precision fastening and high-torque applications.
The Snap-on 7-8mm 12-Point Metric 0° Offset Ratcheting Box Wrench (Model RBM78C) is a professional-grade precision tool designed for servicing high-tensile strength spline nuts and bolts. This dual-size wrench features different sizes at each end (7mm and 8mm), providing versatility for various fastening applications. The 12-point design with precise radial spline teeth engages fastener teeth over a wider area, minimizing stress concentration and enabling the application of high torque while reducing the risk of damage to both the fastener and the tool itself.
Crafted with a chrome finish for superior rust resistance, this ratcheting box wrench complies with Military Specification MS-33787 and MIL-W-8982 standards, ensuring reliability in demanding industrial environments. The tool measures 114.3mm in length with an outside diameter range of 15.1-17.1mm and a head depth of 9.5mm, making it suitable for applications in aviation, aerospace, military, defense, oil and gas, power generation, railroads, and general industrial maintenance. The 0° offset design provides optimal access to fasteners in tight spaces while maintaining maximum torque application capability.
Beyond traditional 12-point fasteners, this wrench can also be effectively used on ordinary 6 and 12-point fasteners, offering performance advantages similar to the Snap-on Flank Drive wrenching system. Ideal for professional technicians and maintenance crews who demand precision and durability, this tool represents the pinnacle of Snap-on's commitment to quality and performance in hand tool manufacturing.
Key Features
- Dual 7mm and 8mm sizes in single tool for versatile fastening applications
- 12-point spline design with precise radial teeth for wider fastener engagement
- Chrome finish for superior rust resistance and durability
- 0° offset design for optimal access in confined spaces
- Military specification compliant (MS-33787 and MIL-W-8982)
- Compatible with 6-point and 12-point fasteners
- High-torque capability with minimal fastener and tool damage
- Professional-grade construction for demanding industrial use
Technical Specifications
| Specification |
Value |
| Model Number | RBM78C |
| Size Range | 7-8 mm |
| Point Style | 12-Point |
| Measurement System | Metric |
| Offset Angle | 0° |
| Length | 114.3 mm |
| Outside Diameter Range | 15.1-17.1 mm |
| Head Depth | 9.5 mm |
| Finish | Chrome |
| Military Compliance | MS-33787 and MIL-W-8982 |
| Fastener Compatibility | 6-point and 12-point fasteners |
| Tool Type | Ratcheting Box Wrench |
| Brand | Snap-on |
| List Price | $32.75 |
| Availability | Backorder - Estimated 05/23/2026 |
