Review on Williams 2 Inch Adjustable Spanner Wrench: Versatile Tool for All Your Tightening Needs by William Rothstein

I need such a L-key to loosen the drill chuck from the drill quill/spindle. Try to find this type of key at your local store. The wrench from this brand seems to be of quite high quality and the price was reasonable. Make sure you order the correct key size. You need to check both the wrench size (the diameter of the pillar you wrap the wrench around) and the pin size (width and depth). Happy with the purchase of an instrument that I will use every few years.