Milwaukee M18 FUEL Brush Cutter Attachment for QUIK-LOK Attachment System. M18 FUEL QUIK-LOK Brush Cutter Attachment is powered by the M18 FUEL Power Head w/ QUIK-LOK and is compatible with our split boom M18 FUEL QUIK-LOK Attachment System. Split shaft Brush Cutter Attachment utilizes a 9" blade with a 4-tooth design, meant to take on more demanding applications. rush Cutter Attachment has an optimized guard design for the best material containment. Attachments feature protected drive shafts for increased durability against drops and storage elements. Brush Cutter Attachment also utilizes optimized gearing to manage the cordless M18 FUEL Power Head RPM output specifically for brush cutting applications.