Description：
Product description：
Name:Pneumatic grinding pen
Material: plastic + Alloy steel
Length: 143mm
Chuck size:3.0mm
Air inlet thread: 1/4-28UNF
Free speed: 70000 rpm
Air pressure: 90psi

Application：
Ideal for final cleaning and polishing of dies, and jewelry and for hobby

Features :
● Quick lettering, use for flexible and comfortable.
● Pen needles is made of special alloy steel, good durability.
● Depending on the difference of material to decide the depth.
● Works great on metal, wood, plastic, glass, stone, porcelain and other hard material.
● This configuration is great for marking tools, parts and more.

Package included:
1 x Micro Air Die Grinder
30 x Alloy grinding head
10 x Grinding wheel head
2 x Spanner

Note：
When using the tool, please add the pneumatic oil for every 2-3 hours at a time (about 5-6 drops) regularly.
Please allow a slight error due to manual measurements.Pls make sure you do not mind before you bid, thank you!.
The color may have different as the difference display,pls understand.