Powerbuilt 941537 Metric 3/8" Drive Socket Set with 12 point Deep and Standard Sockets (27 Piece) Includes shallow sockets: 6mm thru 13mm, 16mm, 17mm, 19mm, 21mm and 22mm Includes deep sockets: 6mm thru 19mm Center holes punched through for added working depth Z-Drive hex surfaces grab the flat sides of bolt heads for stronger grip Super-strong chrome vanadium steel construction