Greenworks 20632 Gen1 20V 8-Inch Pole Saw - 20V Li-Ion 2.6 AH Battery and Charger Inc. GreenWorks Gen1 20V Lithium-Ion Battery System offers a complete lawn care solution 8-inch steel bar and chain makes this a durable tool for those hard to reach quick trimming jobs Pole easily adjusts from 8 ft. to 5 ft. for the perfect reach Auto-oiler feature ensures bar and chain are lubricated for the best cut without the hassle for ease of use Compatible Only with Greenworks Gen1 20V 2.6 AH And 6.0 AH Batteries, Model 29612 and 29212 and Charger Model 29247