If you are trying to build a small drill this is the solution for it. this brass chuck helps to fit a drill bit into your motor.
Specifications
Diameter x Height
8mm x 25mm
Drill Bit
2.5mm ~ 3.0mm
Material
Brass
Package
1 x Mini Drill Chuck 2.5mm to 3.0mm
1 x Hex Key
Shaft Diameter
2mm