Hogue's exclusive molding process is exceptionally superior when it comes to Semi-Automatics. Because the rubber used actually chemically bonds to the insert, it is possible to have a smooth hard surface on the inside of the grip. This duplicates a stock grip configuration on the inside, and allows exacting tolerances to be maintained. This is a very important feature that sets Hogue apart. Other brands with steel inserts must wrap rubber all the way around the insert which can hang up on the vital working mechanisms found so close to the grip on many automatics. Also because rubber doesn't have to wrap all the way around, this insert design allows a smaller and more comfortable grip for high capacity double stack magazine guns.