DCD771 in cordless drill combo kit features 2 speed transmission (0-450 / 0-1500 RPM) DCD771 high performance motor of cordless tools combo kit delivers 300 unit watts out (UWO) of power ability completing a wide range of applications DCD771 compact, lightweight design of the drill/ impact driver combo kit fits into tight areas DCD771 1/2-inch single sleeve ratcheting chuck provides tight bit gripping strength DCD771 Ergonomic handle delivers comfort and control DCF885 Compact (5.55-inch front to back), lightweight (2.8 lbs) design fits into tight areas DCF885 1-handed loading 1/4-inch hex chuck accepts 1-inch bit tips DCF885 features 3 LED light ring withe 20 second delay to provide visibility without shadows