The Profile "Sabre" is a unique sprocket that takes a universal adapter insert making it work with both 19mm,22mm and 24mm bolt on and splined driven cranks. 
Here's how it works:

A. Choose a Sabre sprocket

-Options for freestyle: 25, 28, 30, 33t in 1/8 inch teeth, black only.
-Options for Race: 36 through 45t in 3/32, black only. 
***The race versions do not have extra spider bolt holes and will only work with the 19mm and 22mm Spline Drive Inserts.

B. Choose a Sabre insert

-19mm Bolt On
-19mm Spline Drive
-22mm Bolt On
-22mm Spline drive
-24mm Bolt Drive

--Made from 7075 aluminum
--Laser etched finish
--Black only

Weight without insert:
25t--76g/2.65oz
33t--122g/4.3oz
45t--177g/6.2oz