100pcs Mini Drill Chuck 0.3-4mm Keyed Mount Taper w/3.17mm Shaft Connecting Rod

Drill Chuck Work For 0.3mm ~ 4mm Mount Inner Hole Diameter 6mm
Features:
High precision screw thread and tapered hole.
Strong impact resistance.
Compatible with impact dril and different power electric drill.
taper the biggest end of diameter: 6.350mm
taper The smallest end of diameter: 5.800mm
Outer diameter: 21.5mm
Taper: 2 degrees 49 minutes 24.7 seconds
Work with 0.3mm-4mm( 0.01" - 0.16") Drill,The maximum clamping 4.2mm.
Connection size: (inner hole diameter is 6 mm)

Package list:
100pcs Drill Chuck
100pcs panner
100pcs 3.17mm connector