McMaster 5304A52 12-Point Opening Combination Wrench, 5/16" Size, 5-3/4" Overall Length
Your go-to wrenches for routine maintenance. With two different ends, you need fewer tools to tighten and loosen nuts and bolts. The open end slides onto the side of fasteners for adjustments in tight spots. When nuts and bolts won't budge, the box end fully encircles them to apply maximum torque. Drop forged for added strength, these wrenches will be part of your toolbox for life.
12-Point Opening — The most common opening, these wrenches work on hex and 12-point nuts and bolts. They slide onto hex heads at more angles than 6-point fasteners for quicker engagement, but they're more likely to slip when you apply more torque.
Chrome-Plated Steel — The most popular finish, these wrenches won't rust or chip. Although they withstand moisture better than black oxide, they don't hold up to harsh chemicals as well as stainless steel.
Polished — The smooth surface is easy to wipe clean of grime. The mirror-like finish lends a high-end look to any toolkit.
| Wrench Style | Combination |
| Drive Size | 5/16" |
| Overall Length | 5 3/4" |
| Material | Chrome-Plated Steel |
| Box End Opening Shape | 12-Point |
| Box End Drive Style | External Hex, External 12-Point |
| Box End Head Style | Offset |
| Box End Head Offset Angle | 15° |
| Box End Head Thickness | 7/32" |
| Open End Opening Shape | Round |
| Open End Drive Style | External Square, External Hex |
| Open End Head Style | Standard |
| Open End Opening Angle | 15° |
| Open End Head Thickness | 5/32" |
| Ratcheting | Nonratcheting |
| Appearance | Polished |
| For Use With | Screws and Nuts |
| Grade | Industrial |
| Number of Heads | 2 |
| System of Measurement | Inch |
| Country of Origin | United States |