Features:
Good product - I typically use at start of range session as reminder of correct grip. Easy to fit to club and can be used to replicate full normal swings. Would recommend to all golfers as fundamentals very important to being consistent golfer.
I bought this to keep my grip in check over the winter. I tend to use it for the first few shots while warming up on the range, just enough to remind me! Easy to attach to any club, clips on and off.