Please Note Before Buying 
①our drill bits are NOT suitable for impact drills.
②whether the size fits your device.
③3/ 4mm drill bits' shank is round, others are triangular.
④Please try to keep the drill vertical and use WATER or COOLANT for lubrication when drilling, it can increase the service life of drill bit.

Specification
1. Drilling Dia: 3mm, Total Length: 80mm
Working Length: 40mm, Shank Dia: 3mm

2.  Drilling Dia: 4mm, Total Length: 80mm
Working Length: 40mm, Shank Dia: 3mm

3.  Drilling Dia: 5mm, Total Length: 80mm
Working Length: 40mm, Shank Dia: 4mm

4.  Drilling Dia: 6mm, Total Length: 100mm
Working Length: 50mm, Shank Dia: 4.5mm

5. Drilling Dia: 7mm, Total Length: 120mm
Working Length: 70mm, Shank Dia: 6mm

6. Drilling Dia: 8mm, Total Length: 120mm
Working Length: 70mm, Shank Dia: 6.5mm

7. Drilling Dia: 10mm, Total Length: 120mm
Working Length: 70mm, Shank Dia: 7.5mm

8. Drilling Dia: 12mm, Total Length: 120mm
Working Length: 70mm, Shank Dia: 9mm

Features:
Made of YG6X carbide, It is stronger hardness and wear resistance than ordinary alloy materials,not easy to break and bend, Improving work efficiency and extending service life.
Anti-skid shank allows drill bit to be held tightly and stably in device, and special U groove drill design speeds up chip removal, improves work efficiency and saves time and effort.
The bright appearance can be find easier; With the appropriate size design is easy to store, does not take up space, and is also easy to put in the tool bag and easy to carry
Can be installed and used, cordless electric drill general-purpose, bench, electric drills and hand drills. Ideal for drilling tile, concrete, brick, glass, ceramic, plastic, wood etc.

Package Include
1Pcs x 3 /3 /4 /4 /5 /5 /6 /6 /7 /8 /10 /12mm drill bit with plastic storage box, total 12pcs.