Professional 18-21 mm metric box wrench with Flank Drive® system, 10° offset handle for superior knuckle clearance, 12-point design, and nickel-chrome finish. Delivers 15-20% more turning power with reduced fastener damage risk.
The Snap-on 18-21 mm 12-Point Metric Flank Drive® 10° Offset Box Wrench (Model XBM1821A) is a professional-grade hand tool engineered for superior performance in demanding industrial applications. This metric box wrench features the innovative Flank Drive® wrenching system, which provides up to 15-20% more turning power compared to conventional wrenches, while significantly reducing the risk of tool and fastener damage. The 10° offset design positions the handle away from the box end, delivering maximum knuckle clearance and enabling access to fasteners in tight, confined spaces where standard wrenches cannot reach.
Constructed with premium nickel-chrome plating, this wrench offers exceptional durability and corrosion resistance with a mirror-like finish that simplifies cleaning and maintenance. The 12-point configuration provides versatility for working with various fastener types, while the optimized size and balance ensure comfortable handling during extended use. Meeting ASME® B107.100 standards, this tool is built to withstand the rigorous demands of professional mechanics, technicians, and industrial maintenance operations. The wrench measures 303 mm in length with precise dimensions engineered for optimal performance across the 18-21 mm range.
Whether you're working in automotive repair, machinery maintenance, or heavy equipment service, this Flank Drive® offset box wrench delivers the reliability, power, and precision that professionals demand. Its superior grip design and reduced fastener slippage make it an essential addition to any professional tool collection.
Key Features
- Flank Drive® wrenching system provides 15-20% more turning power with reduced tool and fastener damage
- 10° offset handle design maximizes knuckle clearance for access in tight confined spaces
- 12-point configuration offers versatility for working with various fastener types
- Premium nickel-chrome plating with mirror-like finish resists corrosion and simplifies cleaning
- ASME® B107.100 certified professional-grade construction for industrial reliability
- Optimized size and balance for comfortable extended use
- Precision engineered dimensions for optimal performance across 18-21 mm range
Technical Specifications
| Specification |
Value |
| Model Number | XBM1821A |
| Size Range | 18-21 mm |
| Point Configuration | 12-Point |
| Offset Angle | 10° |
| Outside Diameter (Dimension A) | 25.9-29.9 mm |
| Head Depth (Dimension C) | 11.9-13.3 mm |
| Overall Length (Dimension E) | 303 mm |
| Finish | Chrome (Nickel-Chrome Plating) |
| Style | Box Wrench with Offset Handle |
| Standard Compliance | ASME® B107.100 |
| Wrench Type | Flank Drive® Metric Box Wrench |
| Application | Professional hand tool for automotive, machinery, and industrial maintenance |
