This 0.5-3mm twist drill chuck set is made of copper with excellent workmanship. 
It is suitable for 0.5-3.0MM drill bit.
For small drills, after connecting with the motor, drill holes for the PCB circuit board with special micro drills.
Compatible with most rotary tools used in hardware, hobby, home etc Clamping Diameter
Ideal for combined use with a hand drill or electric drill,to drill ABS,wood board,presspaper,etc

Description:
Adapter Drill: 0.5mm-3.0mm
Material: Copper
Color: Gold
Copper Drill Folder Size: 2.35mm/ 3.17mm
Suitable for use with hand drills or electric drills

Package includes:
1x Small Wrench
1x Copper Drill Folder
5x Drill Collet

Notes:
1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.
2. Please allow slight dimension difference due to different manual measurement.