4PCS/Set 0.3-4mm Drill Chuck Even Sleeve Chuck Miniature Electric Drill Chuck Tail Hole Through 3.17mm

Features: 3.17 mm Brass Mini Electric Motor Shaft Clamp Drill Chuck for 0.3 mm-4 mm 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 dirll clamp Material: Brass Weight:76g Match the motor shaft Diameter: 3.17mm.

Specification: 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, The maximum clamping: 4.2mm. Connection size: JT0 (inner hole diameter is 6 mm) JT0 taper the greatest end of diameter: 6.350mm JT0 taper The smallest end of diameter: 5.800mm 3.17mm Brass Mini Electric Motor Shaft

Package included:4PCS(Electric drills are not included)