Hipshot Grip-Lock Guitar Tuner BK R

I bought 6 of these tuners (3 left, 3 right) and none of them work as they are supposed to. They look really nice and appear to be well made but...... The locking pins don't retract when the wheel is turned unless you hit them really hard into the palm of your hand. This would make it impossible to put strings in once its on the guitar unless you are prepared to hit the guitars headstock and risk damage. If it was just one of the tuners i would chalk it up to bad luck but as all 6 have the same problem then it means there is a quality control problem. Considering the price I would expect way better from a large well known company. I will be getting a refund and buying from a different manufacturer.