Description 1 2 Inch to 1 4 Inch Conversion Chuck For Engraving Machine Specifications Material SteelOuter Diameter 1 2 InchInner Diameter 1 4 InchTotal Length 27mmUsage Engraving MachineQuantity 1pc Features 1 Spring steel material extra long life good flexibility and abrasion resistance 2 Tight and stable clamping high precision 3 For drills boring knife engraver reamer etc Package Included 1 x Chuck ConversionNotice 1 Please allow a bit error due to manual measurement please make sure you do not mind before you bid 2 The color may have different as the difference display pls understand More Details