Bits will not fit. After cutting some test pieces for the doors I made, they did fit not together. Such sockets usually connect the rack and rail without any problems. They may not be cut correctly and one sits higher than the other, but they fit together. Seeing two bits in different containers, I realized that I had problems.I don't normally see matches sold in different cases, honestly you never do.So after a few hours of extra work between my table saw and removing the ogee blade from the bit I was able to make my doors With that in mind I will never buy from them again!