Gai Tronics 13306 101 Weatherproof Re entrant Horn 1.5 ft equivalent air column 6620 Valves 350 Degrees F Valves 350 Degrees F Application Valves General Purpose Material of Construction cast iron Connection Type Check Valves Flange x Flange Flow Design Single Mechanism and Body Design Inline Swing Mounting Orientation Check Valves Horizontal Item Spade Drill Bit Set Measurement System Fractional Inch Material Machining Carbon Steel Finish Machining Bright (Uncoated) Cutting Direction Right Hand Primary Material Application Wood Material Steel Alloy Drill Bit Material Carbon Steel Application wood drilling Number of Pieces 6 Drill Style Spade Sub Brand Speedbor Shank Type Machining Hex Adjustable Blade No Nail Cutting No Number of Drill Bits 6 Decimal Equivalent 0 Provides a Dispersion Angle of 100 Degrees Includes 1 3 8" 18 UNEF Thread (Female) for Driver Connection