Forespar's Ultra Adapting Collar is the sleeving used on larger diameter tubing for Forespar pole end-fittings. This TS inboard fitting was designed for the TransPac Yacht Race. Its socket automatically locks onto a mast car toggle pin with one push. Simply press a lever to release. The arrangement reduces torsion loads on the spinnaker pole and chafing on sheets and guys.
This socket end adapts a pole with a 3.5 in. (89mm) outer diameter and a 3 1/4 in. (83mm) inner diameter.