These grips are made of soft rubber with a cobblestone (stippled) surface for good grip control. One Piece Monogrip design with a stirrup that attaches the grip to the gun through the bottom of the grip. Open Backstrap, finger grooves, palm swells and is relieved for speedloaders. Conversion grips convert a round butt frame to a square butt feel or vice versa. Note: Will not fit Shorty .40 or CS45