There's a chance I'll need a .050" or 1.27mm - 1.3mm Allen/hex wrench today. 1.3mm should do it. If anyone has one that I could come use or borrow, it would be greatly appreciated. On the other hand, if anyone knows of a store or specialty shop at which I could purchase one, or a set that includes one, please let me know. Admittedly, I only checked at Walmart when I was picking up the Mobil 1 and filter for my car. Please and thank you!!