Sig Sauer P365 Pinky Extension is an improvement over the polymer OEM base pad, our P365 Pinky Extension is machined out of 6061 aluminum. They are much more tolerant of being dropped on rocky or cement surfaces for heavy tactical or training use. The added weight of these base pads also aids the magazine in dropping free from the magazine tunnel for rapid and consistent reloads. The extended magazine gives the shooter a more robust grip. Great for big hands or those shooters wanting a fuller grip for their Sig Sauer P365.