What is the thickest branch my pole hedge trimmer can cut through? The thickest branch the SJH902 will be able to cut through would need to have a diameter of .7 of an inch or less. Related articles What angles can my pole hedge trimmer adjust to? What is SharperBlade? How should I maintain and store my Hedge Trimmer? With so many makes and models of Walk-behind Edgers, how does one (1) SharperBlade fit on all of them? What can the SharperBlade cut?