Tour lock pro 20 gram weight obviously there have been lots of advances in club technology in the past 25 years one of the most recent is strategic weight placement and studies show that when the proper weight is utilized in the grip overall perfomance improves back weighting a club has been around for a while now and the grip itself is in essence a backwieght but its never been easier than using the tour lock system tour lock pro technology has made back weighting easier and more effi