Specifications:
Chuck Capacity Min.: 0.3mm/0.01 inch
Chuck Capacity Max.: 3.5 mm / 0.13 inch
Mounting Hole Diameter: 3.17mm/0.12 inch
Material: Brass + Steel

Features:
1) Made of high quality brass and steel material, resistant to wear and tear, strong and durable.
2) The chuck can hold tools such as drills with a diameter of 0.3-3.5 mm for drilling, polishing and grinding.
3) The chuck is designed with non-slip texture, which makes it easier to work during the process.
4) Brass connecting rods are available in different bore diameters for mounting on motor shafts of corresponding diameters.
5) Compatible with most rotary tools, such as mini drill, electric grinder, etc..

Package Included:
1 x Shaft Core
1 x Quick-change Chuck
1 x M3 Key

Notes:
1.Manual measurement, with small error.
2.Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness.

Thank you!