DEWALT 8 Piece Assorted Woodboring Self feed Drill Bit Set Interlocking Tiles Because it is hollow Because it is hollow Coordinates with 3 4in Series Name N A Sub Brand N A Bit Type Self feed bit Bit Length Assorted Shank Size 7 16 in Shank Type Hex Material High speed steel Case Type Hard Quick Change Yes For Use With Power tool For Use on Metal No For Use on Wood Yes Warranty None Set Individual Set Package Quantity 8 CA Residents: Prop 65 Warning(s) Yes Brand Model Compatibility All Bit Diameter (Inches) Assorted Aggressive spur provides fast material penetration Optimized cutting geometry provides longer bit life Open tooth design allows for more resharpenings 7 16 In ball groove shank for quick change applications Applications include drilling rough holes in wood for running pipe