Jacobs Chuck Sizes:
Jacobs-250 1/4″ dia.
Jacobs-312 5/16″ dia.
Jacobs-375 3/8″ dia.
Jacobs Keyless Chuck capacity from 1/10″ – 3/8″ (1.5 mm to 10 mm)
Shipping UPS for this adjustable Jacobs Chuck is available in the United States only. Any other shipping should contact us.