The Milwaukee M12 Fuel Expander delivers the fastest 3/8 in. -1 in. connections. Utilizing an auto-rotating head mechanism the M12 Fuel Expander provides even expansions for the most consistent installations. The new Expander Heads with provide the fastest seal for less down time before pressure testing. Access tight locations to install tubing with the compact right angle design for fast and easy installations. All-metal gears and an integrated metal frame deliver maximum tool durability on the job site. The Brushless Motor delivers the fastest expansions yet runs cooler with no wearable components. The Compact Battery Pack delivers up to 20% more power and 2X more recharges than standard lithium-ion batteries as well as best-in-class performance in extreme jobsite conditions. The onboard fuel gauge helps you monitor the charge more accurately so there s less downtime on the job.