My wrists seem to be a prevalent area of issue in regards to lifting for me, well, particularly the bench press. I'm fine up to a point and then I'll reach a certain weight on the bench where my wrists will snap back (extend) as I'm benching. Not only does this make the sets themselves uncomfortable and unsatisfying but I feel as though it's really halting my progress on the exercise.
The question I have, and I've tried to be as succinct as possible, is if my problem is simply due to mechanics or if it's an inherent problem concerning my wrists -- do I need to get my grip strength up? I have pretty small bone structure and as a result small wrists.