XMark Single Grip Handle Cable Attachment XM-3650The XMark Single Grip Handle Attachment XM-3650 with rubber grip handle is a must have attachment for any cable machine when isolating different muscle groups. Use XMark Single Grip Handle for tricep extensions, bicep curls, cable crossovers, single arm rows and much more. Sculpt, build and define your body with XMark, the mark of excellence.