The ryobi r4sd l13c 4v compact screwdriver is ideal for screw driving even in confined areas and assembling flat packed furniture the compact design and class leading super bright led means it is easy to use in dimly lit tight spaces and at obscure angles this product benefits from ryobirsquos innovative lithium technology with an integrated lightweight 4v lithium ion battery meaning it is always ready to use with no self discharge and no memory effect with 5nm torque 180rpm and class lea