Chucks & Chuck Keys
You can use a spare glove, piece of leather or something similar to wrap around the chuck first if you’re concerned about the jaws marking the drill. In one of the Chucks & Chuck Keys, position the drill bit. Also, when holding the piece, use a glove to prevent you from cutting your hand. Then grab the chuck, use the pliers.
That have three adjustable jaws to lock on the drill. When tapered to provide these sizes. Geared drill chucks come in different sizes, the most common being the 3/8 or 1/2-inch chuck. Chuck Keys are the keys used when installing and removing bits from the chuck to tighten and loosen drill chucks.