Feature：
Engraving Bit CNC Router Tool Adapter after heat treatment and precision grinding, hardness HRC62, fine grinding, concerted and high precision size; suitable for engraving machine ER collet.
Quality spring steel production, heat treatment, has good flexibility and abrasion resistance.
Clamping force, high accuracy, good gripping stability.
Commonly used in the engraving machine spindle motor folder knife, with the engraving machine collets use.
Specification：
Material：steel
Size OD to ID（mm）：
6.35-3.175
6-4
6.35-4
Package include：
1x Engraving Bit CNC Router Tool Adapter