Material : Spring steel
<br />Function : Engraving bit CNC router tool Adapter 6mm to 3.175mm 1/8"
<br />Size  Dia. (Outer): 6mm ,Dia. (Inner): 3.175mm(+/-0.1mm)
<br />Length: 24mm
<br />Package Included: 1 pcs CNC router tool Adapter