6Pcs 1/4 Inch to 1/8 Inch Cnc Engraving Bit Router Adapter Convert for Engraving Machine Tool

Commonly used in the engraving machine spindle motor folder knife with the engraving machine collets use. Suitable for engraving machine ER collet. colour:black Material:High speed steel Size:6.35 to 3.175mm Package Contents: 6* tool conversion sleeve Only the above package content other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.