Inserts: 
2011 - Fits 2011 & Double Stack Magazines - P320, M&P, VP9, ETC
Glock - Fits Glock 9/40/45
Glock19 magazines are the shortest  you want to use in these pouches. Will not work for Glock26 or similer magazines they too short in height.
 
Single pistol with rare earth magent on the front. 
 
Magnets on belts or pouches have been a gamer thing for a long time.  Handy for retaining a partialy spent magazine or various other admin type things.
 
The magnet do not aid in magazine retention for the mag in the pouch.
 
*esstac will be phasing out the PALS webbing on the rear of Kywi pouches with Brookwood Laminate Squadron laser cut PALS backers. Squadron is currently in use with many of their current pouches. 
 
During the transition, orders may contain pouches with webbing, the new laser cut backer, or a mix of both.
 
There is no guarantee of which version you will receive.