8X Hot Electric Drill Grinding Mini Drill Chuck Key Keyless Drill Chucks 0.3-4mm With 3.17mm Shaft Connecting Rod

Outer diameter: 21.5mm Taper: 2 degrees 49 minutes 24.7 seconds Work with 0.3mm-4mm( 0.01 inch - 0.16 inch) Drill The maximum clamping 4.2mm. Connection size: JT0 (inner hole diameter is 6 mm) color: Silver Material: Chrome vanadium steel Package list: 2 x Drill Chuck 2 x T spanner 2 x L spanner 2 x 3.17mm connector note: Does not include motor Only the above package content other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.