6 Pieces 5 Flute Countersink Drill Bits for Wood Specification:
Material: High speed steel
Surface treatment: Titanium coated
Handle diameter: 1/4 inch hex shank
Size: 1/4 inch (6 mm), 5/16 inch (8 mm), 3/8 inch (9 mm), 1/2 inch (12 mm), 5/8 inch (16 mm), 3/4 inch (19 mm)