The Tandemkross Cornerstone Safety Thumb Ledge for the Ruger Mark IV 22/45 is a precision-engineered accessory designed to enhance your shooting experience. With its sleek black finish this thumb ledge provides superior control and stability allowing for more accurate and consistent shots. Specifically crafted for the Ruger Mark IV 22/45 model it offers an ergonomic design that ensures a comfortable grip and improved handling. The Cornerstone Safety Thumb Ledge is an essential upgrade for any Ruger enthusiast seeking enhanced performance and safety.