4pcs/set 0.3-4mm Micro drill chuck

Description: 100% brand new and high quality! Made of high quality material, durable and practical. Specification: Chuck Features: Material: High-carbon steel Outer diameter: 21.5mm Taper: 2 degrees 49 minutes 24.7 seconds Work with 0.3mm-4mm (0.01" - 0.16") Drill Tail hole: 3.17mm The maximum clamping: 4.2mm. Connection size: JT0 (inner hole diameter is 6 mm) JT0 taper the biggest end of diameter: 6.350mm JT0 taper The smallest end of diameter: 5.800mm Chuck Features: High-carbon steel production Strong impact resistance. High precision screw thread and tapered hole. Compatible with impact drill and different power electric drill. Brass Mini Electric Motor Shaft Features: Material: Brass Match the motor shaft Diameter: 3.17mm. 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 BRASS. Close-fitting with 3.17mm motor shaft Copper rod for 0.3~4mm JT0 drill clamp Package Included: 1pc x Drill Chuck 1pc x Spanner/key 1pc x 3.17mm Shaft Connecting Rod