DEWALT Impact Ready 20 Piece Impact Driver Bit Set Tankless Water Heater 1 to monitor the internal 1 to monitor the internal pressure of the tank while the other regulates the rate of air flow Eco Friendly Materials: Made from sustainable resources and low emission materials Sub Brand Impact Ready Brand Model Compatibility Universal Bit Length Set Shank Size Set Shank Type Hex Material High speed steel Head Type Set Adaptor Included No Set Individual Set Double Ended No Warranty None Case Type Hard Package Quantity 20 CA Residents: Prop 65 Warning(s) Yes Number of Pieces 20 Best in class most common impact driver accessories New patented pivot holder drive straight or in pivot mode Ideal for any applications where impact drivers are used Ideal for general contracting