Professional 5/16-3/8" 12-point SAE half-moon box wrench with Flank Drive® technology providing 15-20% more turning power, chrome finish, and ASME® certified quality for industrial maintenance.
The Snap-on 5/16–3/8" 12-Point SAE Flank Drive® Half-Moon Box Wrench (Model CX1012) is a professional-grade precision tool engineered for demanding industrial applications. This versatile wrench features the innovative Flank Drive® wrenching system on the box-end, which delivers up to 15-20% more turning power compared to conventional wrenches while significantly reducing the risk of tool or fastener damage. The half-moon design provides optimum comfort and balance in your hand, making it ideal for extended use in maintenance and repair operations.
Constructed with premium nickel-chrome plating, this wrench features a mirror-like finish that provides superior protection against corrosion and oxidation while maintaining easy cleanability. The 12-point design offers flexibility in fastener engagement, allowing multiple approach angles for improved accessibility in tight spaces. Meeting ASME® B107.100 standards, this tool is built to deliver consistent performance and reliability in aviation, aerospace, military, defense, oil and gas, power generation, railroad, and general industrial applications.
With its carefully engineered dimensions and ergonomic handle radius of 2-1/16 inches, this wrench delivers professional-level performance for technicians and maintenance professionals who demand the best. The total length of 4-5/8 inches provides optimal leverage without excessive bulk, while the head depth of 3/16–5/16 inches ensures compatibility with a wide range of fastener configurations. This is an essential tool for any serious tool collection.
Key Features
- Flank Drive® wrenching system provides 15-20% more turning power with reduced tool and fastener damage
- 12-point design allows multiple approach angles for improved accessibility in tight spaces
- Nickel-chrome plating with mirror-like finish resists corrosion and is easy to clean
- Ergonomic half-moon design sized for optimum comfort and balance during extended use
- ASME® B107.100 certified for professional-grade reliability and consistent performance
- Versatile sizing accommodates both 5/16" and 3/8" fasteners in single tool
- Precision-engineered dimensions for compatibility across aviation, aerospace, and industrial applications
Technical Specifications
| Specification |
Value |
| Model/SKU | CX1012 |
| Size | 5/16–3/8 inches |
| Style | 12-Point SAE Half-Moon Box Wrench |
| Finish | Chrome with Nickel-Chrome Plating |
| Length (Dimension E) | 4-5/8 inches |
| Outside Diameter (Dimension A) | 15/32–9/16 inches |
| Head Depth (Dimension C) | 3/16–5/16 inches |
| Handle Radius (Dimension F) | 2-1/16 inches |
| Standards Compliance | ASME® B107.100 |
| Wrenching System | Flank Drive® Technology |
| Performance Advantage | 15-20% more turning power than conventional wrenches |
| Brand | Snap-on |
| List Price | $59.50 |
| Stock Status | Available in stock |
