Giới thiệu 6 đầu mũi khoan định tâm 60 độ 1/1.5/2/2.5/3/5mm

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Features:
Can be applicable to iron, steel, copper, aluminum and other
processing.
Each bit has a double end and grinding at a standard 60 degree Angle.
Sharp and durable, accurate positioning, cutting edge clear.
Quick cutting speed, and good chip removal.
For precise center drilling in metals.
When rotating between the tips, the two end faces of the workpiece receive the corresponding centering bore.
Preparation tool to maintain the exact drilling position.

Specifications:
Quantity: 6 PCS
Product
Specification: 1.0mm, 1.5mm,  2mm, 2.5mm, 3mm, 5mm
Specific dimensions: as the picture
Weight: 60g
No.
Body diameter
Drill tip diameter
#1
4mm
1mm
#2
4mm
1.5mm
#3
5mm
2mm
#4
6mm
2.5mm
#5
8mm
3mm
#6
12mm
5mm
Usage:
1. Center and spotting drills are traditionally used to make a conical
hole for a lathe center in order to make a starting point for a standard
twist drill,
designed to prevent the twist drill from walking.
2. Used for work pieces with require machining between centers or producing center  in components.

Package Included:
6 x Center Drill Bits
Note:
Due to manual measurement, may exist 1-3mm error, please understand, thank you!