This is the only kit that works with Savage bolts with the cocking indicator in the BAS.  Sometimes bolt lift is improved by as much as 50% though most tend to be in the 20-30% range.

What makes it better and different? It is the only kit that works with those Savages that have the cocking indicator. This new kit uses a specially modified thrust bearing and a spacer for the BAS screw. One thing I noticed is that most other bolt lift kits compress the firing pin spring more which does the opposite of decreasing bolt lift. The spacing ring fixes this issue. Also the thrust bearing take friction down to near zero compared to all the other kits that still have friction.

Installing it is simple and easy. You only need a 1/4n Allen wrench to take off the BAS screw. The Bearing washers stack as show in the photos.
 
For Savage Axis uses this provides you with an easier solution that does not require you to shorten your firing pin spring.
 
This kit is available with a black steel spacer or a stainless steel spacer.