Product review (5 stars): Saved us from a $150 repair call!
Our GE washer (WCXR1070T4WW) was filling and spinning, but not agitating. A few YouTube videos led us to investigate the agitator coupler, and it did look like the teeth were worn. We decided to hold off on calling in a repairman until we tried out this $4 coupler, and whaddaya know, it worked! Fabulously easy to replace, and we now have a working, agitating washer.