The 8-piece hand power tool set will give little builders hours of fun screwing and unscrewing the Masterkidz Wall Screws on the STEM Wall. The power drill works in forward and reverse and comes with a built-in clutch to stop overtightening. Either of the four different tool bits fit the Wall Screws. All tool bits can be used with either the power drill or the separate handle. The set includes a spanner so three children can work independently. The drill and accessories fit neatly into the wooden holder attached to the STEM Wall. Ages 3yrs+