Specificaton:
Color: Black and white
Material: Aluminum alloy and carbon steel

Size-Clamping Range:
1/4 inches-0.3 - 6.5 mm

Package List:
4 x drill chucks

These hex and round shanks small drill chucks can give you the freedom to drill with one hand, fit for working in tight spaces.

The shanks have to be tightened by a wrench if you are using a regular drill bit or a specialty bit; otherwise the chuck will loosen up and just spin in place.

Great for most projects and since it is solid metal you cannot be unhappy with the purchase.
Be aware of the pitfall of using the keyless chuck and be prepared to pull out the grinder if you use a lot of quick connect tools.