There are several ways to keep your parallels in place in your vise. After reviewing several, i think i have found a method which is simple, effective, easy, and very inexpensive: I purchased four 1/8 by 1/2 by 1 magnets from a supplier (forgot the name, many suppliers out there) and they work great. Cost was about $15.00 with shipping. The tool and die guy, phil kerner, recommended springs. I prefer the magnets, they work great. Hope this idea helps someone, as it can be a problem.