This is a crowfoot wrench organizer I designed for my 10 piece Craftsman metric set. This set goes from 10mm - 19mm. The organizer holds them vertically rather than a clip rail where they have to be staggered horizontally. The measurements for each socket varied at the base, so some tweaking may be required even if you own this same set. I added a detent to each position to help keep the sockets in place.