ITEM NAME:2X(Cnc Engraving Bit Router Adapter Convert 1/4 Inch to 1/8 Inch for EngravJ3Z3) 2X(Cnc Engraving Bit Router Adapter Convert 1/4 Inch to 1/8 Inch for EngravJ3Z3) 2X(Model Number:Engraving Bit Router Tool Adapter heat treatment,has good flexibility and durability Clamping force,high accuracy,good grip stability Often used in the engraving machine spindle motor folder knife,with the engraving machine collets use colour:Silver + black Material:steel Size:24*6.35*3.175mm Package Contents: 5 *router tool Adapter)