Definitely not recommended to install in a griping surface.
Below is the relevant excerpt from x-Series faq’s
Q: Can I install an x-series glass transponder into another area in my hand, maybe the palm side?
A: Many customers ask if it would be ok to install one of our glass transponders into another area of the hand, possibly the palm. We do not recommend that our x-series tags be installed anywhere but the suggested location between the thumb and index finger metacarpal bones. The reason for this is that the x-series tags are glass coated, meaning even though we tested them with a series of force meter tests, they should not be subjected to unnecessary stress or force. Placing a transponder in any other area of the hand will introduce additional risk, and placing one in the palm side of the hand or anywhere that exerts grip on objects, would surely result in broken glass.
Have a read through THIS thread for some other suggested locations