Ball bearing swivel bases feature dual rows of Delrin® ball bearings that swivel freely even under high loads. Bases include stand-up springs and a U-adaptor to accept a variety of appropriate blocks. Delrin® is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.

• Minimum line Ø (mm) 8 mm
• Minimum line Ø (in) 5/16 in
• Maximum line Ø (mm) 10 mm
• Maximum line Ø (in) 3/8 in
• Use with 57 mm/2.25" double ratchets