Shur-Line 6570L Easy Reach Adjustable Extension Pole, 2-1/2-Feet to 5-Feet Simply Depress Thumb Lever to Lock and Release Glides with almost zero effort Extends from 2 1/2 to 5 feet Reduce trips up and down a ladder Threading is 3/4-5 acme thread. Fits a variety of Shur-Line painting attachments.