For the pro mechanic or serious DIYer, this Stanley Proto 16mm open end wrench is built to handle the tough jobs. It's not your average wrench – the heads are angled at 15 degrees, which lets you flip it to four different positions to get into tight, awkward spots where a straight wrench just won't fit. It's engineered to grip fasteners tightly so you can apply more torque without rounding off bolt heads. The whole wrench gets a double nickel plating treatment, which makes it super corrosion-resistant and easy to clean, so it'll look good and work great for years in your toolbox. Proto is a trusted name in professional tools for a reason. If you need a reliable, high-quality 16mm wrench that can tackle anything, this is the one.