Features: Accuracy engineered 8 piece Spring Steel Ball Driver Socket Retainer ensures with DCF845/DCF850 series, eliminating slippage while maximizing transfer efficiency for secure high intensity operations. Crafted from wear resistant carbon steel and high carbon spring steel, this driver socket retainer features spring loaded steel that maintain constant clamping force during heavy duty applications. Ideal for professional mechanics, construction workers, and enthusiasts requiring socket retention for power tools in automotive repair shops or industrial job . Optimizes driver during stubborn , machinery maintenance, and assembly line operations where resistance and tool stability are critical. Engineered to replace OEM parts like N864734 and NA202231, this driver spring collar delivers factory grade compatibility while withstanding repeated cycles without deformation. Specifications: : Suitable for DCF845 DCF845B DCF845N DCF845P1 DCF845P2 DCF845D1E1 Cordless Driver Suitable for DCF850B DCF850 DCF850N DCF850P1 DCF850P2 DCF850E1 Cordless Driver Replacement part number: Replace N864734 Replace NA202231 Replace N921819 Package Includes: 1 note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.