We have Panasonic EY7940LZ2S 14.4-Volt IP56 Li-ion Hammer Drill & Driver Kit with Product Detail IP56 - Dust and Water Resistant Compact & Lightweight. Length 7 7/8" 3.86lbs Hammer mode: High speed: 200-1,400 rpm and a maximum of 25,200bpm. Low speed: 70-400 rpm to get a maximum of 7,200bpm 1/2" Keyless Chuck, 2 - 3.1Ah Li-ion "Z" Battery Packs GuardION Battery Protection System . The "Panasonic EY7940LZ2S 14.4-Volt IP56 Li-ion Hammer Drill & Driver Kit" is best product for you. We recommended Panasonic EY7940LZ2S 14.4-Volt IP56 Li-ion Hammer Drill & Driver Kit