● It has strong toughness and wear resistance.
● Incision resistance are small, increase the opening speed, long service life.
● Industrial grade Coated Carbide Point with 4 Cutting edges.
● Can be installed in the hand drill, electric drill.
● Suitable for Ceramics, granite, tiles, stone, wood, plastic,concrete wall to   drilling hole.
 
Specification:
 
● Material: Metal.
● Model:  Seven pieces suit.

Size information:
Specification
Total length of drill
Working length
Drill diameter
Shank diameter
3mm
73mm
38mm
3mm
6.35mm
4mm
74mm
39mm
4mm
6.35mm
5mm
75mm
40mm
5mm
6.35mm
6mm
76mm
41mm
6mm
6.35mm
8mm
78mm
43mm
8mm
6.35mm
10mm
82mm
55mm
10mm
6.35mm
12mm
95mm
68mm
12mm
6.35mm