The part arrived and was just what I wanted. However, I was unable to remove the original screw. To do this, you need to hold one bit with a clamp/pliers and screw the other clockwise, which is because it is counter threaded. there are youtubes of this easily available. I suggest if anyone else is contemplating buying a replacement like I did, first of all see if you can remove the original screw. Because now I have an unused replacement base gear and I had to buy a whole new blender anyway. Good Luck, thrifty people!