These are great for placing between a socket and extension to give you something to grip when threading on a nut or bolt. You can leave it in place during the remainder of your ratcheting but they do not have a locking mechanism to keep it securely attached to the socket. These are not ratcheting mechanisms so don't be misled. They are only knurled attachments to help you turn sockets more easily. It you have socket sets with knurled ends these are overkill. The 1/4" & 3/8" adapters are great but I absolutely don't get the 1/4" male by 1/4" hex bit adapter at all since I will never drive a socket with a 1/4" hex bit. If it were a 1/4" female by 1/4" hex bit adapter I could see it being useful since it would allow you to ratchet drive standard hex bits. You could use it to turn 1/4" hex screwdriver style bits but what good is a 1/4" male socket end sticking up in your palm of your hand going to do for you. This is obviously something Craftsman threw in the package to make it look like you are getting more to justify the cost or a clever way for a designer that made a huge mistake by specifying male instead of female when ordering from the tool supplier. The real deal would have been to include a 1/2" adapter exactly like the other two so you would cover all three normal sizes from 1/4 to 3/8 to 1/2" With that said I got the set for half price and am happy with the two normal sizes and will allow the absolutely useless one that I described to collect some serious dust. The only thing I will say is that I do not recommend you pay full price for this set since one item is useless. If you get it for less then buy it. If you already have knurled sockets then don't even think about it.
These work very well, but its odd that the 3/8 adapter is not like the 1/4 adapter. The 1/4 adapter has a square receiver so you can connect your ratched directly to it to break a bolt free or give the last little snug. But the 3/8 adapter has a hex receiver. Very odd. And the third one is a hex to 1/4 adapter. Not sure that I'd ever need that one unless I loose the regular 1/4 adapter.
I bought this for a friend because I let him use mine and he was amazed at the amount of torque you can exert with your fingers. Great tools.
Made by Cal-van for Sears. One of the few Craftsman tools still made here. I was surprised to see that when I picked it up off the shelf. I'm looking forward to a use for these on some upcoming projects.