The Clayton Off Road jam nut wrench is designed to provide a tight fit at a much more affordable cost. A standard 1-7/8" (1.875) wrench is not only expensive but may allow too much wiggle room when you really need to torque down on your suspension hardware. This tool kit includes two wrenches. One is a crow's foot design that contacts all 6 sides of the 1 1/4" jam nut . The other is a standard designed wrench for easier access in hard-to-reach spots. Ensuring your suspension hardware is tight and remains tight is critical to years of trouble-free use. This wrench is therefore 1.843, which provides a superior fit , without the worry of rounding off your jam nut. Designed to be used with a 1/2 driver or torque wrench. NOTE Large is slightly undersized compared to a standard 1-7/8" wrench (1.875") 1.843" is the Inside width. These wrenches are designed specifically for the Jam Nuts used on Clayton Off Road products and may not work on non Clayton Off Road applications . These wrench ends are designed for typical installation and adjustment tasks. For situations requiring sustained high torque or frequent use, a properly sized box wrench is recommended. This set is intended to support Jeep enthusiasts during lift kit installation and general maintenance. Maximum torque should not exceed 200 ft/lbs!