Milwaukee M18 FUEL 3 Ft. Attachment Extension for QUIK-LOK Attachment System. M18 FUEL QUIK-LOK 3 Ft. Attachment Extension is powered by the M18 FUEL Power Head w/ QUIK-LOK and is compatible with the M18 FUEL QUIK-LOK 10 In. Pole Saw and Articulating Hedge Trimmer Attachments. Extension attachment gives you 3' of additional length for applications requiring further reach. Attachment includes a padded grip giving you increased comfort. Extension's QUIK-LOK Coupler has a positive locking mechanism and alignment guide allowing you to quickly make attachment changes. QUIK-LOK Attachments feature protected drive shafts for increased durability against drops and storage elements.