Tight torque technology - open end of wrenches is designed to remove fasteners rounded up to 50% while the box end of wrenches is designed to remove fasteners rounded up to 70%. tight torque technology also helps prevent the rounding of fasteners in common maintenance and automotive applications. Increased leverage - loosen stubborn fasteners with a long panel design that provides increased leverage vs. CRAFTSMAN raised panel wrenches. Quick-find markings “ quickly find the right tool for the job with easy-to-read sizes on each wrench. Meets or exceeds ASME specifications “ these products are engineered to meet rigorous standards and satisfy the most demanding users. Sleek, modern finish “ get rust resistance with a gunmetal-chrome finish.