Wrench markings are in Newton meters and Kilograms. Etched markings are very difficult to read. If you enjoy doing complex math conversions in inch-pounds and eye strain, this tool is for you. The ratchet is similar to the 24 tooth design and the directional lever has no secure lock or detent. The locking feature on the handle slides and allows the handle to rotate. This is not a precision tool designed for a professional handyman. Spend more money and get a better key. Update: I am starting a refund as the key is of poor quality. The screws fall out of the ratchet head and I can't install the nut because the locking ball won't allow it.