3Pcs Spiral Step Cone Drill Bit Set HSS 1/4" Hex Shank Hole Bits for Metal Wood

 Features：

【Drill Bit Set contain 3 size】：4-12mm, 4-20mm and 4-32 mm, Supplied with a portable fabric bag.
【Double groove design】：Provide faster and smoother drilling, provide less pressure, and cut wood, plastic and other surfaces with a thickness of less than 5mm. The stepped cone drill is designed to accurately drill holes of different sizes from 4 mm to 32 mm in diameter, with the best speed
【widely used】：The ability and durability of high-speed steel with titanium coating to drill holes in plastic, aluminum, copper and many other types of metal plates have been proved. Titanium drill bits are especially suitable for processing copper and aluminum parts, die steel, cast iron, iron and other metal materials.
【Quick Assemble】: 1/4" hex shank work with most drill or drills with 1/4" chuck,makes for easy, convenient, and quick stepper bit switches and is compatible with impact ready power tools.
【Sizes】： 15 Step Bit: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm) 9 Step Bit: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm) 5 Step Bit: 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)

Specification:

Type: Drill Bit
Color: Gold
Material: High-speed Steel (HSS )
Shape: Straight
Surface Treatment: Titanium Coated
Shank Type: Hex
Hex Shank Diameter Ø : 6.35mm(1/4")
Size: 4-12mm / 4-20mm / 4-32mm
4-32mm 15 steps Sizes: (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm); 
4-20mm 9 steps Sizes: (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)
4-12mm 5 steps Sizes: (4mm, 6mm, 8mm, 10mm, 12mm)
Quantity: 3PCS

Package Includes:  

1Pcs ------ Step Drill Bit 4-12mm
1Pcs ------ Step Drill Bit 4-20mm
1Pcs ------ Step Drill Bit 4-32mm