The TandemKross Accelerator Thumb Ledge is a precision-engineered accessory designed specifically for Ruger Mark IV 22/45 pistols in a sleek black finish.TandemKross Accelerator Thumb LedgeCompatible with Ruger Mark IV 22/45 pistolsBlack anodized finishCompact dimensions: 0.80" x 2.30" x 3.00"SKU: TK26N0535BLK1This thumb rest accessory enhances grip stability and shooting comfort making it an ideal upgrade for competitive shooters and enthusiasts looking to improve their Mark IV 22/45 performance.