The Morse taper end fits into a machine spindle and the Jacobs taper end is compatible with a Jacobs taper drill chuck.

For better control when drilling small holes with a drill press or milling machine, the attachment on these arbors lets you apply light feed pressure with your fingers while the machine rotates the bit.

A ball-bearing design provides increased gripping force to keep bits from slipping, which allows these chucks to take on high-torque drilling applications. Also known as super chucks.