The Super Thumb ST2 magazine loader fits: Taurus PT-45, Glock 9mm or 40 cal, Para Ordinance 45 cal, STI high cap or SVI (high capacity), Sig Sauer 229 or All Pro, Caspian high cap, H&K USP 45 (including compact), Kimber (high capacity), Astra A100, Beretta 9000 9mm or 40 cal, Beretta Cougar 8045, S&W M&P (all calibers) and Ruger SR9.When it comes to high cap magazines there are a few that are extra wide, most notably Para's and Glock's. For these situations you need something wider than ST1 provides so we came up with ST2 which covers a lot of them as seen on our chart.