ITEM NAME:Brass Electric Drill Chuck JT0 Coupling Motor Shaft Coupler Clamp Fixture 3.17mm 100% brand new and high quality 3.17mm Brass Mini Electric Motor Shaft Clamp Drill Chuck for 0.3mm-4mm Drill Drill Clamp JT0 Connection Rod Connect Motor Drill for 3.17mm Motor Shaft 3.17mm Shaft Coupling Motor Connector for 0.3~4mm JT0 dirll clamp Specifications: Material: Brass Match the Motor Shaft Diameter: 3.17mm/0.12" Length: 20mm/0.79" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you.Drill Clamp JT0 Connection Rod Connect Motor Drill for 3.17mm Motor Shaft. for 0.3~4mm JT0 dirll clamp. 3.17mm Shaft Coupling Motor Connector. 3.17mm Brass Mini Electric Motor Shaft Clamp Drill Chuck for 0.3mm-4mm Drill.