The Thin Red Line wrist wraps from Clarksville Barbell Club are the stiffest wrist wraps I have ever experienced. They are not for the faint of heart. Do NOT purchase these if you are not serious about maxing out your 1RM on the bench or competing in powerlifting! These wraps create a solid cast that does not allow your wrist to move. Keeping these wraps on for more than one rep could lead to the loss of feeling in your hands.
 
Check out the video here: https://youtu.be/GZhBkUaL_mY