Panasonic EY7960LZ2S 21.6-Volt IP56 Li-ion Hammer Drill & Driver Kit The IP56 is dust and water resistant Compact length of 9-inches and lightweight at 5.5 pounds Hammer mode high speed is 350-1,500 rpm and a maximum of 27,000bpm 1/2-inch Keyless Chuck, 2 - 3.1Ah Li-ion "Z" Battery Packs GuardION Battery Protection System IP56 - Dust and Water Resistant Compact & Lightweight. Length 9" 5.5lbs Hammer mode: High speed: 350-1,500 rpm and a maximum of 27,000bpm. Low speed: 100-400 rpm to get a maximum of 7,200bpm 1/2" Keyless Chuck, 2 - 3.1Ah Li-ion "Z" Battery Packs GuardION Battery Protection System