ITEM NAME:Brass 2.3mm Electric Drill Chuck JT0 Coupling Motor Shaft Coupler Clamp Tw.Drill Clamp JT0 Connection Rod Connect Motor Drill for 2.3mm Motor Shaft. for 0.3~4mm JT0 dirll clamp. 2.3mm Shaft Coupling Motor Connector. 2.3mm Brass Mini Electric Motor Shaft Clamp Drill Chuck for 0.3mm-4mm Drill.