As usual delivery AMAZON is great, as well as that of UPS carrier by its exactitude.MAIS! (It takes a ...). Some sockets are for use with a key with a square 3/8 ", so buying a piece of 1/2 transformation" female / 3/8 "male. Too bad this is not reported on the ad section as what not included. For the quality of the product priori this is correct, this is the time of use who can say .... NOTE: For the use of all sockets must therefore key 3 different male extra cost if you do not have them all ... Sincerely. friend