4pcs Spiral Step Drill Bit Sets with Center Punch Set Cone Hole Cutter Metal Wood Tools

• --Deburring, chamfering, expanding oval hole
• --It is recommended to drill wood and plastic
• --Titanium step drill bit set is only suitable for drilling thin aluminum plate and iron plate
• --Surface treatment: Titanium plating

Description:
Name:  Drill Bits

Product material: high speed steel 4241
Specifications: 
4-32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm)
4-20mm (4, 6, 8, 10, 12, 14, 16, 18, 20mm)
4-12mm (4, 5, 6, 7, 8, 9, 10, 11, 12mm)

Packing list:
3 x Drill Bits
1 x Center Punch
Note:
Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. 
Manual measuring,please allow 1~3mm error,thank you.