10Pcs HSS Drill Bit of Each: 1, 1.5, 2, 2.5, 3, 4, 5, 6mm          5Pcs HSS Drill Bit of Each: 7, 8mm

10Pcs Wood Drill Bit of Each:  4, 5, 6mm                                 5Pcs Wood Drill Bit of Each: 8, 10mm

HSS Drill Bit: HSS

Masonry Drill Bit: Body: Carbon Steel          Tip: Tungsten Carbide

Wood Drill Bit: Carbon Steel

HSS Drill Bit: Rolled & Polished

Masonry Drill Bit: Milled

Wood Drill Bit: Rolled

HSS Drill Bit: Type N Regular Flute

Masonry Drill Bit: R Flute

Wood Drill Bit: Type N Regular Flute

HSS Drill Bit: Bright

Masonry Drill Bit: Nickel Plated

Wood Drill Bit: Black & Bright

1. For metal, pvc and plastic drilling - HSS drill bits (made from High Speed Steel)
2. For masonry, wall, glass and tile drilling - masonry drill bits (the shank is made from carbon steel or chrome steel, the tip is made from tungsten carbide)
3. For wood drilling - brad point drill bits, flat drill bits and auger bits (usually made from carbon steel, sometimes made from HSS steel for special purpose)

4.Whether it’s a home improvement job or a more complex building project, the set giving you a variety of tools for a multitude of DIY tasks.

5.A combined set with drills of various types (for wood, metal, concrete) of the most common sizes,It is designed for household use.