Tapcon 3157407 Concrete Anchor Screw 2 1 4 in Overall Lg, 1 4 in Dia, Steel, Climaseal, Hex, Steel, 100 PK ITW42272CT Sound Minimum AC Voltage Measured Sound Minimum AC Voltage Measured 30 V Power Source Battery Maximum AC Voltage Measured 122 kV Number of Digits 0 Number of Batteries Required 1 Testing Functions Voltage Detector Input Impedance Not Applicable Battery Chemistry Alkaline Maximum Operating Temperature 125 Degrees F Package Quantity 1 For Container Type Cartridge Wood Sub Brand Tapcon Material Steel Finish Blue Climaseal Head Type Hex Drive Type External Hex Material Quality Standards ASTM B117 Ultimate Shear Strength (4 System of Measurement Inch