Our Jam-Proof End Tip fits most equipment on the market. This item allows you to attach your squeegee and other window cleaning tools to an extension pole without getting jammed. Lots of technical expertise went into the design of our new end tip so that it would hold handles firmly, yet release them easily. Easy-on and easy-off. To reduce tip-to-handle friction, one or two O-rings may be removed from the tip. Sörbo introduced the Jam-Proof End Tip in 2010.