Ryobi RY40225 Expand-it 40V-Lithium-ion Replacement Power Head Works with all Ryobi 40-Volt Lithium-ion tools and batteries Variable-speed trigger for optimum control Accepts Ryobi Expand-it attachments and other universal gas attachments Durable plastic construction Includes 40-Volt lithium-ion high capacity battery and 90 minute Charger