DIN2080 NT40 Integrated Keyless Drill Chuck 1-16MM NT40-APU16
What is the difference between keyless chuck and keyed chuck?
Keyed chucks offer the advantage of applying additional torque on the bit when slippage is a concern during heavy-duty applications. Keyless chucks are engineered to quickly loosen and tighten a tool on the chuck collar of the drill, either by manual operation or when torque is applied.
The keyless style are easier and quicker, but don't seem to hold as tight. Like others I do a lot of drilling and tapping operations. I find the keyed style chucks hold much better on any quick reverse operation.