Even though this poor excuse for a vise isn't mine, I found the floppy handle incredibly annoying. On my Wiltons, I drill and tap the hub, and insert a brass slug, spring, and setscrew. But on this Alltrade, they drilled the hole for the handle very close to the end of the hub, which made the use of an off the shelf setscrew difficult. To save space, I made a hollow setscrew, so that I could nest the spring and most of the brass slug inside it. The threads are 5/16-24, the tpi to get fine adjustment if necessary, and the diameter to accommodate the internal spring. From an aesthetic standpoint, I'm not entirely happy with the machine work on the setscrew, but the owner won't notice or care.