Drill Chuck

ratcheting (drill) chuck?

I have been looking to buy a new cordless drill.There are two drills that I am looking at.One has a self tightening chuck and the other has a ratcheting chuck.

What is a ratcheting chuck?

What exactly is the difference between the two?

chuck less you use your hand to tighten and the ratcheting chuck is the older style with a new type of key to tighten

NOS 5 16 Rohm Drill Chuck for Sherline Lathe with 1 Arbor for Lathe or Mill
NOS 5 16 Rohm Drill Chuck for Sherline Lathe with 1 Arbor for Lathe or Mill
$34.50
Time Remaining: 13h 50m
Buy It Now for only: $37.99

NOS 1 4 Rohm Drill Chuck for Sherline Lathe with 0 Arbor for Tailstock Mount
NOS 1 4 Rohm Drill Chuck for Sherline Lathe with 0 Arbor for Tailstock Mount
$32.50
Time Remaining: 5d 13h 47m
Buy It Now for only: $36.00

CAMERON micro precision drill press with Albrecht Keyless Chuck PRICE REDUCED
CAMERON micro precision drill press with Albrecht Keyless Chuck PRICE REDUCED
$750.00
Time Remaining: 21d 7h 24m
Buy It Now for only: $750.00