1/4, 3/8 and 1/2 metric I got it as a gift and bought the CAE myself in the kit , fell in love with the organization. You can tuck 1/2 under the frame of the car and it will be magnetized and no sockets will fall out upside down. I only have one issue and it's for the 3/8 metric which I can't rate, the lack of 21mm is a huge disappointment but it's got 20mm which is pretty odd when 21mm almost every day be used. I put my 21mm in a 20mm hole and just remember it's 21 not 20. Do yourself a favor and spend a few extra dollars on magnetic organizers. I've had organizers that hook into the outlet like a ratcheting anvil and you have to pick them down or lean them to the side, saves a lot of time and frustration.
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