American Barbell Imported Revolving Solid Curl Bar – This hard chrome solid steel gym cable attachment series was originally designed and distributed by GP Industries, and continues to be produced today under the American Barbell brand name with the same industry-respected engineering and commercial quality. American Barbell’s import line of cable attachments are 25.4mm (1.00”) diameter with a Hard Chrome finish. Precise knurling gives a sure comfortable grip. American Barbell specially designed cable accessories feature a multi-axis rotating swivel for ease of attachment and full functional use. Use this cable curl bar attachment to perform bicep curls and tricep extensions.