Ryobi csd4130gn 4v lithium ion cordless screwdriver with 30 piece accessory set ryobi 5133001037 p this 4v screwdriver from ryobi features the best gripzone overmould technology to make screwdriving as satisfying and simple as possible the quickchange chuck with automatic spindle lock allows one handed bit changing with 30 screwdriver bits included along with a convenient gripcase it is great for a range of different purposes and means you should never lose track of the screwdriver bits