Woodtek 921950, Bits, Drill And Boring, Bradpoint, 15/32" Carbide Bradpoint Bit Woodtek carbide tipped bradpoint drill bits give superior wood boring performance. Specifications: Bit Diameter=15/32 in, Flute Length=2-3/8 in, Material=CARBIDE TIPPED Specifications: Overall Length=5 in, Shank Diameter=3/8 in