Performance Tool W1716 Thumbwheel Ratchet Set, 3-Piece High torque non slip grips 1/4-Inch drive has 43 gear teeth and 3/8-Inch and 1/2-Inch drives have 72 gear teeth Contains 1 each of 1/4-Inch drive, 3/8-Inch drive and 1/2-Inch drive Lifetime warranty