maxpower 9-piece 3/8-inch e-torx star socket set - e7, e8, e10, e11, e12, e14, e16, e18, e20 maxpower <b>fits 9 types of sockets</b></br> maxpower socket set fits nine types of screws, bolts, and nuts. these are: e7, e8, e10, e11, e12, e14, e16, e18, e20. this socket set fits 3/8-inch wrenches. </br><b>made from s2 steel</b></br> s2 steel is made to be harder than 8650 graded steel. this method makes them hard to break or slip while working.