D 20 KAU-20 Features: -Set include 37 pieces.-Forged, tempered UD profile sockets, hand-operated.-Plastic case.-Robust lever-change reversible ratchet, push-button release.-Torx: Reg. trademark.-Often used in industry.-Size: 3/16 - 1/2" AF.-Drive connector square (female): 0.25".-Drive connector hexagon (female): 0.25". Dimensions: -Overall Dimensions: 7.87" H x 4.72" W x 1.5" D, 1.45 lbs.