Ever so often it becomes necessary to make a tool to do a specific job. These two pair of bench made cross-lock tweezers will work nicely to hold larger parts together, better than the store bought variety.
Parallel jaws about an inch apart with a light touch.
Need to place a small part on a larger plate? Say a head onto a shank.
These have the advantage of being made from materials at hand. Coat hangers become cross-locking tweezers. All in a day's fun. I make my own copper tongs. too.