ITEM NAME:0.3-3.4mm 3MM Change Adapter Drill Converter Engraving Machine Conversion Product Description Description: Specifications: Material: Aluminium alloy Size: approx. 5*1.5*1.5cm/1.96*0.59*0.59'' Net weight: approx. 10g Clamping range: 0.3-3.4MM Handle length: 3mm Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Included: 1 x Drill Chuck.Handle length: 3mm. Included: 1 x Drill Chuck. Clamping range: 0.3-3.4MM. Due to the different display and different light, the picture may not reflect the actual color of the item. If item is defective after 3 months, you can still send it back to us.