The Pro Series is the Ultimate Grip System complete with aluminum bar ends, tuning kit, assembly tools, and your color choice of grips and lightened clamps. 
Each Pro Series Kit includes installation tools and all pieces to adjust feel/performance to any one of 5 different levels (from soft to firm).  New style Suspension Insert Rings are included in the kit.
Once you have a set, all soft goods can be replaced individually or an entire Rebuild Kit (Grip, Inserts, etc.) can be purchased for $35.  30-Day Money Back Guarantee.  Some assembly required.