Apart from being yellow, this grinder has no other hallmarks. I thought it might be a Dewalt but it didn't look like a Dewalt model I had seen online I didn't know what key size to go for as some of them seem to be designed for a specific brand so this adaptability was accurate the right thing it works great just loosen the nut move the jaws to where they should be and tighten the nut for the $8 in change I paid for this wrench I now have a nice one Grinding machine and many projects waiting for it.