Very helpful and did the job. I really like the quality of this light compared to others. I originally used a 3D printed jig but it only worked half the time and eventually stopped working. I then resorted to the screwdriver method, which also gave me problems. I finally gave in and bought this little thing. And it worked! The quality is good, unlike the cheap plastic I used for my 3D printer. With this device I was able to successfully ground pins 1 and 10. It does its job well. :)