The ERGO Warrior Grip provides enhanced control of your Standard Frame 1911, even with the interference of moisture and debris. Ergo Warrior Grip Features: Constructed of rigid polymer frame with soft rubber insert molded in, providing enhanced weapon control even with the interfering presence of moisture and debris. Duty and competition proven SUREGRIP feel on a square bottom design. XTR Features: Heavily textured, minimally abrasive hard rubber design Fits Standard Model 1911 frames Thin profile attaches with standard grip screws Designed to accommodate ambidextrous safety options. Available in tapered (PN; 4511), or square bottom design for proper fit with mag wells.