Features :

• Quick lettering, use for flexible and comfortable.
  Pen needles is made of special alloy steel, good durability.
  Depending on the difference of material ,depth can be up to 1mm.
  Works great on metal, wood, plastic, glass, stone, porcelain and other hard material.
  This configuration is great for marking tools, parts and more.

Specification:

• Pen Needles Material : Alloy steel
  Main Color: Silver
  Impact Frequency: 16500RPM
  Ferquency: 0.28CFM
  Air Consumption: 0.08（m3/min）
  Working Pressure: 90Psi
  Air Inlet Size: 1/4"
  Size: Φ18*132L

Air Supply:

• Recommended air pressure for this tool is 90 Psi. Higher pressure will cause excessive wear on the tool's internal parts and shorten its life . Water in the air line will cause damage to the tool.Drain the air tank and line daily or as often as necessary,depending on weather on weather and temperature conditions.
  

Package Include:

• 1Pc Engraving Pen
  2Pcs Wrench